How severe is CVE-2025-51991?

CVE-2025-51991 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-51991 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-51991?

CVE-2025-51991 affects Xwiki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-51991?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-51991 have an EU (EUVD) identifier?

Yes. CVE-2025-51991 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25310.

When was CVE-2025-51991 published?

CVE-2025-51991 was published on 2025-08-20 and last updated on 2026-06-17.

CVE-2025-51991

CVE-2025-51991 is a high-severity vulnerability in Xwiki with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25310
Weakness: CWE-79
Affected product: Xwiki
Published: 2025-08-20
Last modified: 2026-06-17

Description

XWiki through version 17.3.0 is vulnerable to Server-Side Template Injection (SSTI) in the Administration interface, specifically within the HTTP Meta Info field of the Global Preferences Presentation section. An authenticated administrator can inject crafted Apache Velocity template code, which is rendered on the server side without proper validation or sandboxing. This enables the execution of arbitrary template logic, which may expose internal server information or, in specific configurations, lead to further exploitation such as remote code execution or sensitive data leakage. The vulnerability resides in improper handling of dynamic template rendering within user-supplied configuration fields.

Frequently asked questions

What is CVE-2025-51991?: XWiki through version 17.3.0 is vulnerable to Server-Side Template Injection (SSTI) in the Administration interface, specifically within the HTTP Meta Info field of the Global Preferences Presentation section. An authenticated administrator can inject crafted Apache Velocity template code, which is rendered on the server side without proper validation or sandboxing. This enables the execution of arbitrary template logic, which may expose internal server information or, in specific configurations, lead to further exploitation such as remote code execution or sensitive data leakage. The vulnerability resides in improper handling of dynamic template rendering within user-supplied configuration fields.
How severe is CVE-2025-51991?: CVE-2025-51991 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-51991 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-51991?: CVE-2025-51991 affects Xwiki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-51991?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-51991 have an EU (EUVD) identifier?: Yes. CVE-2025-51991 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25310.
When was CVE-2025-51991 published?: CVE-2025-51991 was published on 2025-08-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*

More vulnerabilities in Xwiki

CVE-2024-31996 — Critical (CVSS 10.0): XWiki Platform is a generic wiki platform. Starting in version 3.0.1 and prior to versions 4.10.19, 15.5.4, and…
CVE-2024-31982 — Critical (CVSS 10.0): XWiki Platform is a generic wiki platform. Starting in version 2.4-milestone-1 and prior to versions 4.10.20, 15.5.4,…
CVE-2024-21650 — Critical (CVSS 10.0): XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. XWiki is…
CVE-2023-46731 — Critical (CVSS 10.0): XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. XWiki doesn't…
CVE-2023-26477 — Critical (CVSS 10.0): XWiki Platform is a generic wiki platform. Starting in versions 6.3-rc-1 and 6.2.4, it's possible to inject arbitrary…
CVE-2025-53836 — Critical (CVSS 9.9): XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc)…

All CVEs affecting Xwiki →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →