Description

ILIAS before 9.24, 10.12, and 11.5 contains a PHP object injection vulnerability that allows authenticated users with Test creation or import permission to deserialize arbitrary objects via crafted Test archives. Attackers can inject a malicious tst_sequence sequence attribute that is passed to unserialize(), abusing Guzzle or Monolog gadget chains to write PHP files and execute code.

Related CPE's

Could not find any relations

References

https://docu.ilias.de/go/blog/15821/952

https://docu.ilias.de/ilias.php?baseClass=illmpresentationgui&obj_id=228077&ref_id=35

https://github.com/ILIAS-eLearning/ILIAS

https://github.com/ILIAS-eLearning/ILIAS/blob/2a3758ee3b01e5c66922e08f58a2189146b884d4/components/ILIAS/Test/classes/class.ilObjTest.php#L7364

https://github.com/ILIAS-eLearning/ILIAS/blob/2a3758ee3b01e5c66922e08f58a2189146b884d4/components/ILIAS/Test/classes/class.ilTestResultsImportParser.php#L225

https://github.com/ILIAS-eLearning/ILIAS/commit/267d4645ea940f8f97d1a9838deff6a12097564d

https://github.com/ILIAS-eLearning/ILIAS/commit/ac4684239641fb3dab2d636b53a61c46462d1208

https://github.com/ILIAS-eLearning/ILIAS/commit/cf4e9c230edfd96fc94a1b1d355500aa8c6f1771

https://www.vulncheck.com/advisories/ilias-before-9.24-10.12-and-11.5-php-object-injection-via-test-results-import

Weaknesses

[email protected]

Secondary
CWE-502

CVSS impact metrics

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

8.8 · High

Information

Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-14T19:17:11.723Z

1 hour ago

Last modified

2026-10-14T20:17:31.543Z

32 minutes ago