CVE-2025-2776: SysAid On-Prem Improper Restriction of XML External Entity Reference Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 22 Jul 2025, 76 days after the CVE record was published.

How likely is exploitation in the next 30 days?

64.7%

EPSS score, percentile 99.2 of all scored records

How severe?

9.3 Critical

CVSS v3.1 base score, given by the CNA

What should I do?

Required action (CISA), due 12 Aug 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Advisories and patches (1)

Which versions are affected?

Affected: 23.3.40 and earlier

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 12 August 2025.

Advisories and patches

• documentation.sysaid.com (Vendor advisory)

Linked from CISA's catalog entry

• https://documentation.sysaid.com/docs/24-40-60
• https://nvd.nist.gov/vuln/detail/CVE-2025-2776

Affected products and versions

As listed in the CVE record.

Versions not listed are: affected.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

SysAid On-Prem contains an improper restriction of XML external entity reference vulnerability in the Server URL processing functionality, allowing for administrator account takeover and file read primitives.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2025-2776 to its Known Exploited Vulnerabilities (KEV) catalog on 22 Jul 2025.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 12 Aug 2025.
• The CVE record was published on 7 May 2025, 76 days before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 9.3 (Critical), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 64.7% (percentile 99.2), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact partial.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

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

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

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-611: Improper Restriction of XML External Entity Reference

Attack patterns (CAPEC)

• CAPEC-250: XML Injection

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• labs.watchtowr.com (Exploit)

More exploited SysAid vulnerabilities

• CVE-2025-2775: SysAid On-Prem Improper Restriction of XML External Entity Reference Vulnerability (added 22 Jul 2025)
• CVE-2023-47246: SysAid Server Path Traversal Vulnerability (added 13 Nov 2023)