---
id: "CVE-2026-116204"
kind: "vulnerability"
aliases: ["CVE-2026-116204"]
title: "YesWiki: forged admin request deletes or restores pages via despam action"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "php", "self-hosted", "yeswiki"]
not_affected_if: ["auth-required", "default-config"]
published_at: "2026-10-25T14:17:01+00:00"
first_seen_at: "2026-10-25T14:41:23+00:00"
updated_at: "2026-10-25T14:42:30+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116204", "first_seen_at": "2026-10-25T14:41:23+00:00"}]
---

# YesWiki: forged admin request deletes or restores pages via despam action

YesWiki before 4.7.0 has a cross-site request forgery flaw in its despam action, which accepts state-changing requests without a token check. An attacker can plant an auto-submitting form on a wiki page so that an administrator's browser deletes or overwrites pages.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed YesWiki version in the wiki's version file or admin footer; versions below `4.7.0` are affected.
- Confirm whether `tools/security/actions/despam.php` exists and is reachable in the deployment.

## Fix

- Upgrade YesWiki to `4.7.0` or later.
- Until upgraded, restrict edits and page-level HTML so visitors cannot place raw HTML forms on wiki pages.

## Timeline

- 2026-10-25T14:41:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116204

## From the sources

YesWiki before 4.7.0 contains a cross-site request forgery vulnerability in the despam action (tools/security/actions/despam.php) that lets unauthenticated attackers delete or restore pages through an administrator's session. Attackers can plant an auto-submitting raw HTML form on a wiki page, so an administrator who views it posts clean, suppr[], or rev[] parameters that delete PagePrincipale, configuration pages, or overwrite current content.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_