CASCACascade Atlas

Evidence dossier

CVE-2025-2746

Kentico Xperience <= 13.0.172 Staging Sync Server Digest Password Authentication Bypass

Exploited in the wild (CISA KEV since Oct 20, 2025). VulnCheck reports CVSS 3.1 9.8. EPSS estimates 59.1% exploit likelihood as of Aug 26, 2026.

82.5–84.1Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server password handling of empty SHA1 usernames in digest authentication. Authentication bypass allows an attacker to control administrative objects.This issue affects Xperience through 13.0.172.

State
PUBLISHED
Published
Mar 24, 2025
Updated
Feb 26, 2026
Evidence coverage
92%

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
    VulnCheck

    Record text: Kentico Xperience <= 13.0.172 Staging Sync Server Digest Password Authentication Bypass

    Inspect raw assertion
    Field
    container
    Value
    Kentico Xperience <= 13.0.172 Staging Sync Server Digest Password Authentication Bypass
    Original evidence ↗
  3. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 59.05% probability · 99.04th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.590520000000; percentile 0.990410000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Oct 20, 2025 · first observed Jul 19, 2026

Exploit likelihood59.05%

FIRST EPSS · score date Aug 26, 2026 · 99th percentile · first observed Aug 26, 2026

SeverityCVSS 9.8

VulnCheck · 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 ↗
VulnCheckOriginal assertion
Record text

Kentico Xperience <= 13.0.172 Staging Sync Server Digest Password Authentication Bypass

Inspect raw assertion
Field
container
Value
Kentico Xperience <= 13.0.172 Staging Sync Server Digest Password Authentication Bypass
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

59.05% probability · 99.04th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.590520000000; percentile 0.990410000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
1Underlying assertions
1Canonical products
1Target assertions
0Constraint assertions

Grouped from 1 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

2 scope groups

VulnCheck · source assertedKenticoXperienceDirect source scope
Affected: 0 through 13.0.172 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "13.0.172"}]
NVD CPE · APPLICATIONkenticoxperienceVulnerable target · 1 assertions
Any version (unconstrained) (<= 13.0.172)Canonical identity product-d36d81f92dfbc7a34c041dac1c3fa27816b66000ee841da08b3fb88f869e6c5bLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:kentico:xperience:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through including 13.0.172
    Match ID
    5f120158-7bb3-4080-9dbd-2dea83b05eb1

Affected-product evidence

Accepted scope and product mapping

1 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-7ef5715c1cb1f5b93d04058720a7343bd4bb30bbda2972c01f15564097eddb26 · product-d36d81f92dfbc7a34c041dac1c3fa27816b66000ee841da08b3fb88f869e6c5b

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
d7659f43-6554-4df4-b986-14f31e432347
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
78736258-a5f1-4d27-b6d5-ffceab223720

Assessments

CVSS by origin

9.8
disclosure@vulncheck.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
VulnCheckCVSS 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:H/I:H/A:H

Direct CVE/CNA normalized decisions

9.8Priority eligible

VulnCheck

CVSS 3.1 · Primary · Original assertion · rank 1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
9.8
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.