---
id: CVE-2026-52775
title: YesWiki is a wiki system written in PHP
summary: >-
  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 a…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-89
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki < 4.6.6
patched:
  - yeswiki/yeswiki 4.6.6
published: '2026-09-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:05:26.920'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52775'
references:
  - url: >-
      https://github.com/YesWiki/yeswiki/commit/90ca54fb518e1c43a1ead6e4f5bf9f0389789841
    label: security-advisories@github.com
  - url: 'https://github.com/YesWiki/yeswiki/releases/tag/v4.6.6'
    label: security-advisories@github.com
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-4pf7-cc4r-g63h'
    label: security-advisories@github.com
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-4pf7-cc4r-g63h'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-4pf7-cc4r-g63h'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - composer
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-08T18:04:39.397368Z'
epss: 0.00483
epssPercentile: 0.39075
aliases:
  - GHSA-4pf7-cc4r-g63h
ecosystem: composer
ingestedAt: '2026-07-09T21:52:34.666Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-52775)

Affected packages:

- `yeswiki/yeswiki < 4.6.6`

Patched in:

- `yeswiki/yeswiki 4.6.6`

Source: https://github.com/advisories/GHSA-4pf7-cc4r-g63h