CVE-2026-52762
Published:September 04, 2026
Updated:September 22, 2026
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki Bazar contains a stored Server-Side Template Injection (SSTI) vulnerability in the semantic template feature that can be escalated to confirmed Remote Code Execution (RCE). An authenticated administrator can place arbitrary Twig expressions into the Semantic template (Twig) field (bn_sem_template), and that content is later executed server-side when public semantic endpoints are requested. This issue has been patched in version 4.6.6.
Affected Packages
https://github.com/YesWiki/yeswiki.git (GITHUB):
Affected version(s) >=v4.1.0 <v4.6.6Fix Suggestion:
Update to version v4.6.6yeswiki/yeswiki (PHP):
Affected version(s) >=dev-aceditor-fix <v4.6.6Fix Suggestion:
Update to version v4.6.6yeswiki/yeswiki (PHP):
Affected version(s) >=dev-aceditor-fix <v4.6.6Fix Suggestion:
Update to version v4.6.6Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Special Elements Used in a Template Engine
EPSS
Base Score:
0.45