# CVE-2026-117534: REDAXO cross-site request forgery in article history plugin

Source: https://junglewise.ai/threats/cve-2026-117534-redaxo-before-5-21-3-contains-a-cross-site-request-forgery  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-117534 · Severity: medium · CVSS 5.4 · Published 2026-10-27

REDAXO is a content management system used to manage website content and structure. This vulnerability allows attackers to trick logged-in administrators into deleting all article version history or rolling back article content to earlier versions through unvalidated web requests. An attacker could cause permanent loss of content recovery data or unauthorized changes to published articles by luring victims to a malicious webpage.

Technologies: [REDAXO](https://junglewise.ai/threats/technologies/redaxo). Vendors: [REDAXO](https://junglewise.ai/threats/vendors/redaxo).

## Quick answers

**Is CVE-2026-117534 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-117534 being exploited in the wild.

**How severe is CVE-2026-117534?** Medium severity, with a CVSS score of 5.4, published 27 October 2026.

**Which products and versions are affected?** REDAXO before 5.21.3.

**Is there a fix for CVE-2026-117534?** Yes: fixed in 5.21.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-117534 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-117534?** Check whether you run REDAXO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 5.21.3

## Technical details

The article history plugin in REDAXO fails to validate CSRF tokens on two state-changing actions: clearing all history snapshots (func=clearall) and restoring article snapshots (rex_history_function=snap). Both actions process GET requests via $_REQUEST without token validation, and REDAXO's default SameSite=Lax cookie policy allows cross-site GET requests to carry the victim's session cookie. An attacker needs only to lure a logged-in backend user to a malicious page; no user interaction beyond navigation is required.

## Affected products

- REDAXO REDAXO before 5.21.3

## Timeline

- 2026-07-31: disclosed
- 2026-10-27: advisory

## References

- [https://github.com/redaxo/core/security/advisories/GHSA-vjwx-3c33-xwmc](https://github.com/redaxo/core/security/advisories/GHSA-vjwx-3c33-xwmc)
- [https://www.vulncheck.com/advisories/redaxo-before-5.21.3-csrf-in-article-history-plugin](https://www.vulncheck.com/advisories/redaxo-before-5.21.3-csrf-in-article-history-plugin)

## Related threats

- [REDAXO reflected XSS in metainfo API type parameter](https://junglewise.ai/threats/cve-2026-117537-redaxo-before-5-21-0-contains-a-reflected-cross-site-scripting)
- [REDAXO CSRF token bypass in user administration](https://junglewise.ai/threats/cve-2026-117536-redaxo-before-5-21-3-contains-a-cross-site-request-forgery)
- [REDAXO reflected cross-site scripting in media pool](https://junglewise.ai/threats/cve-2026-117535-redaxo-before-5-21-3-contains-a-reflected-cross-site-scripting)
- [REDAXO stored cross-site scripting in mediapool SVG uploads](https://junglewise.ai/threats/cve-2026-117533-redaxo-from-5-18-0-before-5-21-4-contains-a-stored-cross-site)
- [REDAXO stored cross-site scripting in media and link widgets](https://junglewise.ai/threats/cve-2026-116900-redaxo-before-5-21-4-contains-a-stored-cross-site-scripting)