Executive brief
XWiki is a popular open-source collaborative platform. A security flaw in its 'Livetable' component, which displays data in a searchable table format, allows unauthorized users to extract sensitive information. Specifically, an attacker can reconstruct a user's password hash and salt by sending a series of automated requests, potentially leading to full account takeover.
Technical details
The vulnerability is an information disclosure flaw (CWE-359) in the LiveTableResults component of XWiki Platform. It stems from an insufficient fix for a previous vulnerability where the check for sensitive properties (like passwords and emails) did not account for class names passed via '_class' parameters. By manipulating these parameters, an unauthenticated attacker can perform a side-channel attack to leak password hashes and salts bit-by-bit. An attacker can fully reconstruct a user's credentials in approximately 768 requests. The fix involves adjusting the property class and type checks in the LiveTableResultsMacros.
Affected products
- XWiki xwiki-platform-livetable-ui >= 6.2.1, < 16.10.17; >= 17.0.0-rc-1, < 17.4.9; >= 17.5.0-rc-1, < 17.10.3
Timeline
- 2026-01-07: other: Issue reported in XWiki Jira (XWIKI-23875)
- 2026-01-15: patched: Issue resolved in XWiki Jira
- 2026-05-21: disclosed: Initial advisory publication
- 2026-05-26: advisory: GitHub Advisory updated/reviewed