CVE-2020-15252: RCE in XWiki

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-10-16 · updated 2026-06-17
Weakness: CWE-94

Description

In XWiki before version 12.5 and 11.10.6, any user with SCRIPT right (EDIT right before XWiki 7.4) can gain access to the application server Servlet context which contains tools allowing to instantiate arbitrary Java objects and invoke methods that may lead to arbitrary code execution. This is patched in XWiki 12.5 and XWiki 11.10.6.

Affected products

xwiki-platform: before 11.10.6; from 12.0 before 12.5 — fixed in 11.10.6, 12.5

How to fix

Upgrade to a fixed version: xwiki-platform 11.10.6, 12.5. Check the vendor advisory for mitigations.

References

https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-5hv6-mh8q-q9v8
https://jira.xwiki.org/browse/XWIKI-17141
https://jira.xwiki.org/browse/XWIKI-17423
https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-5hv6-mh8q-q9v8
https://jira.xwiki.org/browse/XWIKI-17141
https://jira.xwiki.org/browse/XWIKI-17423

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