CASCACascade Atlas

Evidence dossier

CVE-2020-36193

Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

Exploited in the wild (CISA KEV since Aug 25, 2022). NVD reports CVSS 3.1 7.5. EPSS estimates 70.6% exploit likelihood as of Aug 27, 2026.

81.7–82.4Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

State
PUBLISHED
Published
Jan 18, 2021
Updated
Oct 21, 2025
Evidence coverage
98%

Evidence chronology

What was known when

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  1. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    mitre

    Record text: Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

    Inspect raw assertion
    Field
    container
    Value
    Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: PEAR Archive_Tar Improper Link Resolution Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    PEAR Archive_Tar Improper Link Resolution Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 70.6% probability · 99.34th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.705950000000; percentile 0.993420000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Aug 25, 2022 · first observed Jul 19, 2026

Exploit likelihood70.59%

FIRST EPSS · score date Aug 27, 2026 · 99.3th percentile · first observed Aug 27, 2026

SeverityCVSS 7.5

NVD · CVSS 3.1 · first observed Jul 19, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1
Exploitation statusEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 2026
Resolution
None
Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision
casca-factor-d-obligations-v1
Cutoff
Aug 27, 2026
Resolution
Resolve identity

Source comparison

Who said what

CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
mitreOriginal assertion
Record text

Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

Inspect raw assertion
Field
container
Value
Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

PEAR Archive_Tar Improper Link Resolution Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
PEAR Archive_Tar Improper Link Resolution Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

70.6% probability · 99.34th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.705950000000; percentile 0.993420000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
11Underlying assertions
4Canonical products
11Target assertions
0Constraint assertions

Grouped from 4 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries
  • Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
  • Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

5 scope groups

mitre · source assertedn/an/aDirect source scope
Affected: n/a
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "n/a"}]
NVD CPE · OPERATING SYSTEMdebiandebian_linuxVulnerable target · 2 assertions
Version 10.0; Version 9.0Canonical identity product-3ccb4bc87dfae98fa2f2a06435fe5b3d9be78572fb958a89f2d7a96b4066447eLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    2 · node/0 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    07b237a9-69a3-4a9c-9da0-4e06bd37ae73
  2. cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    2 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    deece5fc-cacf-4496-a3e7-164736409252
NVD CPE · APPLICATIONdrupaldrupalVulnerable target · 4 assertions
Any version (unconstrained) (>= 7.0, < 7.78); Any version (unconstrained) (>= 8.9.0, < 8.9.13); Any version (unconstrained) (>= 9.0.0, < 9.0.11); Any version (unconstrained) (>= 9.1.0, < 9.1.3)Canonical identity product-212d47c5af963e5c3aa6b05f4c9bed84d410f1ed5651403daaf3aa19bbcf8d60Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 9.0.0; through excluding 9.0.11
    Match ID
    276b4342-920b-4a65-9ec3-c9b14a0a1cda
  2. cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 3
    Logic
    OR
    Version bounds
    from including 9.1.0; through excluding 9.1.3
    Match ID
    d797f0e2-7b51-40bd-8a83-1d3db5899dc3
  3. cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 7.0; through excluding 7.78
    Match ID
    5e1d97a9-5a2f-45b4-a263-2129a57084ac
  4. cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    3 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 8.9.0; through excluding 8.9.13
    Match ID
    d3958c0a-e700-40dd-b4e6-ef9b89e6dfa4
NVD CPE · OPERATING SYSTEMfedoraprojectfedoraVulnerable target · 4 assertions
Version 32; Version 33; Version 34; Version 35Canonical identity product-c96c7662a6606ed7594747da3d7ba9ee3a9758ab11658f6a3f42616361472e47Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    36d96259-24bd-44e2-96d9-78ce1d41f956
  2. cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    a930e247-0b43-43cb-98ff-6ce7b8189835
  3. cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e460aa51-fcda-46b9-ae97-e6676aa5e194
  4. cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    80e516c0-98a4-4ade-b69f-66a772e2baaa
NVD CPE · APPLICATIONphparchive_tarVulnerable target · 1 assertions
Any version (unconstrained) (<= 1.4.11)Canonical identity product-bf60e05eacd62da8e019b89b50cfd1a56f0a026099323fc5c9aebc32bc215fcdLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:php:archive_tar:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through including 1.4.11
    Match ID
    a88baedb-9052-4dc3-bb6f-022a7ee57877

Affected-product evidence

Accepted scope and product mapping

4 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-d55b47b2745317860e139def3459e19d9b08135435764a68197c45036b2c0a7b · product-212d47c5af963e5c3aa6b05f4c9bed84d410f1ed5651403daaf3aa19bbcf8d60

Source class
Nvd cpe vulnerable target
Assertions
4
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
99cd722a-a435-469f-813e-1f4dc9e17e9bdb49e844-20a6-40bb-bad4-88f5ce6eee77ec6e3da3-fdd2-407a-ada6-417fdfc16397f3eae2d4-5896-44b6-a5fe-7c369873fb14
Mapping establishedEvidence supported

vendor-66ae8c5e06427f7450637d18322b0dc411c0b469d940341cf076a620d444fe3c · product-3ccb4bc87dfae98fa2f2a06435fe5b3d9be78572fb958a89f2d7a96b4066447e

Source class
Nvd cpe vulnerable target
Assertions
2
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
acadad2f-19b0-4347-9d8b-9da9919edf79cce54bcd-2591-40fb-984e-ac915e70d6e0
Mapping establishedEvidence supported

vendor-1b299fa4275f757dd43e86a66c279822d72332da344f4534dae151dcbb50c610 · product-bf60e05eacd62da8e019b89b50cfd1a56f0a026099323fc5c9aebc32bc215fcd

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
5d040c7f-9219-4eaa-b823-81595fbef6cb
Mapping establishedEvidence supported

vendor-2d566b06907460b10e6e48c8544126e19f1d6df137983056edae8d0b51e34e45 · product-c96c7662a6606ed7594747da3d7ba9ee3a9758ab11658f6a3f42616361472e47

Source class
Nvd cpe vulnerable target
Assertions
4
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
2bd2daba-01d8-43bf-bb84-9be57f7e028344e9f92e-c761-428e-adcb-d618de9ccad688e57f2b-8ffb-4470-a852-95b985b70271f61cca59-6f6a-4c66-8d17-ef56e4e5c7b1
Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Direct cve affected
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
b6c95e77-837d-40bd-84ee-30500194a2e2

Assessments

CVSS by origin

7.5
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.0
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5
CISA-ADPCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Direct CVE/CNA normalized decisions

7.5Priority eligible

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Validation
Valid match
Recomputed
7.5
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.