ILIAS PHP Object Injection via Shibboleth Logout

Summary

ILIAS before versions 9.22, 10.10, and 11.3 contains an unauthenticated PHP object injection vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting serialized objects through the LTI authentication endpoint and triggering deserialization via the Shibboleth back-channel logout endpoint. Attackers can write arbitrary serialized objects into session storage, then exploit an available POP gadget through the logout endpoint's unrestricted deserialization to write attacker-controlled PHP content to a web-accessible path and achieve remote code execution as the web server user.

Timeline

1. Aug 26, 2026, 3:44 PM UTCCVE published
2. Aug 29, 2026, 2:41 AM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: total

3. Sep 11, 2026Public exploit on Exploit-DB

   EDB-52682

4. Sep 30, 2026, 4:39 PM UTCRecord last updated

Affected versions

• ILIAS-eLearning e.V. ILIAS

  From 9.0 · fixed in 9.22; From 10.0 · fixed in 10.10; From 11.0 · fixed in 11.3

References 9