High severity · published Sep 4, 2026
CVE-2026-52775
YesWiki Authenticated SQL Injection in ReactionManager
8.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
YE
yeswiki · YesWiki
< 4.6.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-52775
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-52775
github.com
https://github.com/YesWiki/yeswiki/commit/90ca54fb518e1c43a1ead6e4f5bf9f0389789841
github.com
https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6
github.com
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-4pf7-cc4r-g63h
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