CVE-2026-116899: REDAXO before 5.21.4 Broken Access Control in Slice Operations

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% 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-639

Description

REDAXO before 5.21.4 contains a broken access control vulnerability that allows authenticated editors to modify slices in unauthorized categories by pairing a permitted article with a foreign slice id. Attackers can abuse content/edit delete and edit functions or the content_slice_status and content_move_slice APIs to delete, toggle, move, or overwrite other editors' slices.

Affected products

redaxo core: before 5.21.4 — fixed in 5.21.4

How to fix

Upgrade to a fixed version: redaxo core 5.21.4. Check the vendor advisory for mitigations.

References

https://github.com/redaxo/core/security/advisories/GHSA-5m63-c3qx-wq8v
https://www.vulncheck.com/advisories/redaxo-before-5.21.4-broken-access-control-in-slice-operations

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