What’s Vulnerable › Vulnerabilities

CVE-2026-117536: REDAXO before 5.21.3 CSRF Token Bypass via users/users Privilege Escalation

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-27 · updated 2026-10-27
• Weakness: CWE-352

Description

REDAXO before 5.21.3 contains a cross-site request forgery vulnerability in the backend user administration page (users/users) because the CSRF token check only runs when the save parameter is set, while the update path triggered by FUNC_UPDATE does not require it. Attackers can lure a logged-in backend user with the users[] permission to a crafted GET link to grant administrator rights, deactivate accounts, or lock out the sole administrator.

Affected products

• redaxo core: before 5.21.3 — fixed in 5.21.3

How to fix

Upgrade to a fixed version: redaxo core 5.21.3. Check the vendor advisory for mitigations.

References

• https://github.com/redaxo/core/security/advisories/GHSA-mrrj-4f5x-j958
• https://www.vulncheck.com/advisories/redaxo-before-5.21.3-csrf-token-bypass-via-users-users-privilege-escalation

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