Vulnerability · Published Sep 4, 2026 · Assigned by GitHub_M

CVE-2026-52775YesWiki Authenticated SQL Injection in ReactionManager

High 8.8

In plain English

A high-severity SQL injection in yeswiki from YesWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.5%top 58.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki through the latest development branch contains a SQL injection vulnerability in ReactionManager::deleteUserReaction() that allows any authenticated user to inject arbitrary SQL via the {idreaction} and {id} URL path parameters. The parameters are concatenated directly into a SQL LIKE clause without escaping or parameterization. This issue has been patched in version 4.6.6.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	yeswiki/yeswiki	4.6.6	GHSA-4pf7-cc4r-g63h

Affected products (as reported)

Vendor	Product	Versions
YesWiki	yeswiki	< 4.6.6

Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/YesWiki/yeswiki/security/advisories/GHSA-4pf7-cc4r-g63h x_refsource_CONFIRM
https://github.com/YesWiki/yeswiki/commit/90ca54fb518e1c43a1ead6e4f5bf9f0389789841 x_refsource_MISC
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6 x_refsource_MISC