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CVE

CVE-2026-80428

ILIAS PHP Object Injection via Shibboleth Logout
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CVE

CVE-2026-80428

ILIAS PHP Object Injection via Shibboleth Logout

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://docu.ilias.de/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&refid=15821&blpg=934, https://docu.ilias.de/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&refid=15821&blpg=935, https://docu.ilias.de/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&refid=15821&blpg=936, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80428.json, https://nvd.nist.gov/vuln/detail/CVE-2026-80428, https://docu.ilias.de/ilias.php?baseClass=illmpresentationgui&objid=225630&refid=35, https://docu.ilias.de/ilias.php?baseClass=illmpresentationgui&objid=225631&refid=35, https://docu.ilias.de/ilias.php?baseClass=illmpresentationgui&objid=225632&ref_id=35, https://github.com/ILIAS-eLearning/ILIAS, https://schweigertit.de/en/advisories/SIT-2026-002.html, https://schweigertit.de/en/writeups/php-object-injection-shibboleth-logout.html

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.04666%
EPSS Percentile
0.91518%
Introduced Version
2151d66e5092fc346bf0bacb49ab7edb468596b3
Fix Available
9a7c60f915ed166b823dbd43dee74da8494567de

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