How severe is CVE-2025-66474?

CVE-2025-66474 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-2025-66474 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66474?

CVE-2025-66474 primarily affects Xwiki Xwiki-rendering. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-66474?

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-2025-66474 have an EU (EUVD) identifier?

Yes. CVE-2025-66474 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202429.

When was CVE-2025-66474 published?

CVE-2025-66474 was published on 2025-12-10 and last updated on 2026-06-17.

CVE-2025-66474

CVE-2025-66474 is a high-severity vulnerability in Xwiki Xwiki-rendering 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-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-202429
Weakness: CWE-94
Affected product: Xwiki Xwiki-rendering
Published: 2025-12-10
Last modified: 2026-06-17

Description

XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Versions 16.10.9 and below, 17.0.0-rc-1 through 17.4.2 and 17.5.0-rc-1 through 17.5.0 have insufficient protection against {{/html}} injection, which attackers can exploit through RCE. Any user who can edit their own profile or any other document can execute arbitrary script macros, including Groovy and Python macros, which enable remote code execution as well as unrestricted read and write access to all wiki contents. This issue is fixed in versions 16.10.10, 17.4.3 and 17.6.0-rc-1.

Frequently asked questions

What is CVE-2025-66474?: XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Versions 16.10.9 and below, 17.0.0-rc-1 through 17.4.2 and 17.5.0-rc-1 through 17.5.0 have insufficient protection against {{/html}} injection, which attackers can exploit through RCE. Any user who can edit their own profile or any other document can execute arbitrary script macros, including Groovy and Python macros, which enable remote code execution as well as unrestricted read and write access to all wiki contents. This issue is fixed in versions 16.10.10, 17.4.3 and 17.6.0-rc-1.
How severe is CVE-2025-66474?: CVE-2025-66474 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-2025-66474 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66474?: CVE-2025-66474 primarily affects Xwiki Xwiki-rendering. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-66474?: 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-2025-66474 have an EU (EUVD) identifier?: Yes. CVE-2025-66474 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202429.
When was CVE-2025-66474 published?: CVE-2025-66474 was published on 2025-12-10 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:xwiki:xwiki-rendering:*:*:*:*:*:*:*:*
cpe:2.3:a:xwiki:xwiki-rendering:17.5.0:-:*:*:*:*:*:*
cpe:2.3:a:xwiki:xwiki-rendering:17.5.0:rc1:*:*:*:*:*:*

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