CVE-2026-52775
Received Received - Intake

SQL Injection in YesWiki Prior to 4.6.6

Publication date: 2026-09-05

Last updated on: 2026-09-05

Assigner: GitHub, Inc.

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 Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-05
Last Modified
2026-09-05
Generated
2026-09-05
AI Q&A
2026-09-05
EPSS Evaluated
N/A
NVD
CVE-2026-52775

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
yeswiki yeswiki to 4.6.6 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

YesWiki before version 4.6.6 has a SQL injection flaw in ReactionManager::deleteUserReaction(). Authenticated users can inject malicious SQL through {idreaction} and {id} URL parameters. These inputs are directly concatenated into a SQL LIKE clause without proper escaping or parameterization, enabling arbitrary SQL execution.

Detection Guidance

To detect this SQL injection vulnerability in YesWiki, check if your system is running a vulnerable version (4.6.x or earlier). Inspect the ReactionManager.php file for the deleteUserReaction method to see if user input is properly escaped before being used in SQL queries. Look for direct concatenation of {idreaction} and {id} parameters into SQL LIKE clauses without escaping.

Impact Analysis

An attacker with valid credentials could exploit this to read, modify, or delete sensitive data in the database. This may lead to unauthorized access to user information, content manipulation, or complete system compromise depending on database permissions.

Compliance Impact

This vulnerability likely violates GDPR and HIPAA requirements for data protection and access controls. It enables unauthorized data access or modification, which could result in data breaches and non-compliance penalties under these regulations.

Mitigation Strategies

Update YesWiki to version 4.6.6 or later to patch the SQL injection vulnerability in ReactionManager::deleteUserReaction().

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-52775. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart