CASCACascade Atlas

Evidence dossier

CVE-2025-2775

SysAid On-Prem <= 23.3.40 Checkin Proceessing XML External Entity Injection

Exploited in the wild (CISA KEV since Jul 22, 2025). NVD reports CVSS 3.1 7.5. Severity assessments differ within at least one CVSS version. EPSS estimates 42.7% exploit likelihood as of Aug 27, 2026.

74.5–80.5Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

SysAid On-Prem versions <= 23.3.40 are vulnerable to an unauthenticated XML External Entity (XXE) vulnerability in the Checkin processing functionality, allowing for administrator account takeover and file read primitives.

State
PUBLISHED
Published
May 7, 2025
Updated
Nov 19, 2025
Evidence coverage
80%

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: SysAid On-Prem <= 23.3.40 Checkin Proceessing XML External Entity Injection

    Inspect raw assertion
    Field
    container
    Value
    SysAid On-Prem <= 23.3.40 Checkin Proceessing XML External Entity Injection
    Original evidence ↗
  3. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: SysAid On-Prem Improper Restriction of XML External Entity Reference Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    SysAid On-Prem Improper Restriction of XML External Entity Reference Vulnerability
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 42.68% probability · 98.61th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.426810000000; percentile 0.986110000000
    Original evidence ↗

Assessments differ

NVD7.5CVSS 3.1 · source date omitted
disclosure@vulncheck.com9.3CVSS 3.1 · source date omitted

Values are shown separately by source and CVSS version.

ExploitationCatalog member

CISA KEV · catalog date Jul 22, 2025 · first observed Jul 19, 2026

Exploit likelihood42.68%

FIRST EPSS · score date Aug 27, 2026 · 98.6th percentile · first observed Aug 27, 2026

SeverityAssessments differ

NVD · CVSS 3.1 · first observed Jul 19, 2026 · values shown separately below

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 assessmentAssessments differ

Eligible assertions materially conflict and remain visible side by side.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 2026
Resolution
Resolve conflict
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

SysAid On-Prem <= 23.3.40 Checkin Proceessing XML External Entity Injection

Inspect raw assertion
Field
container
Value
SysAid On-Prem <= 23.3.40 Checkin Proceessing XML External Entity Injection
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

SysAid On-Prem Improper Restriction of XML External Entity Reference Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
SysAid On-Prem Improper Restriction of XML External Entity Reference Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

42.68% probability · 98.61th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.426810000000; percentile 0.986110000000
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 assertedSysAidSysAid On-PremDirect source scope
Affected: 0 through 23.3.40 (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": "23.3.40"}]
NVD CPE · APPLICATIONsysaidsysaidVulnerable target · 1 assertions
Any version (unconstrained) (<= 23.3.40)Canonical identity product-9b180a8eca93b886e6ecfff2583e0645c1e43d0a53b4fac3ad9ae879515f5098Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:a:sysaid:sysaid:*:*:*:*:on-premises:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through including 23.3.40
    Match ID
    9f967ffc-8ae4-4215-b2f5-333870f75899

Affected-product evidence

Accepted scope and product mapping

1 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-ed00076a916b3ab8eb390334133b41f76c564f5ad99c33cff1ea5e357e4ab0af · product-9b180a8eca93b886e6ecfff2583e0645c1e43d0a53b4fac3ad9ae879515f5098

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
bd2410ff-4150-4c63-a839-33fd0a720f6a
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
04a3afd2-b3fb-4e75-a6c9-415dffc45b1d

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:H/I:N/A:N
9.3
disclosure@vulncheck.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
9.3
VulnCheckCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Direct CVE/CNA normalized decisions

9.3Priority eligible

VulnCheck

CVSS 3.1 · Primary · Original assertion · rank 1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
Validation
Valid match
Recomputed
9.3
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.