CVE-2026-80428 json
ILIAS PHP Object Injection via Shibboleth Logout
published 2026-08-26 2 mo ago modified 2026-09-30 39 d ago also EUVD-2026-66602
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.7%
- EPSS 4.7% chance of exploitation in 30 days, percentile 91%
- public exploits
- 1
- Exploit-DB
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.
Patch / fix
- ILIAS-eLearning e.V. ILIAS 9.22, 10.10, 11.3
Timeline
- Published
- First public exploit (EDB-52682)
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
4.67% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-52682 CVE-2026-80428 Unauthenticated PHP Object Injection via Shibboleth - ILIAS < 9.22_ 10.0 < 10.10_ 11.0 < 11.3 - RCE remote, 2026-09-11
- schweigertit.de https://schweigertit.de/en/writeups/php-object-injection-shibboleth-logout.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | 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 |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 9.3 | 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 |
Affected products
- ILIAS-eLearning e.V. ILIAS
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
docu.ilias.de
/ilias.php?baseClass=illmpresentationgui&obj_id=225632&ref_id=35
patch, product
-
docu.ilias.de
/ilias.php?baseClass=illmpresentationgui&obj_id=225631&ref_id=35
product, patch
-
docu.ilias.de
/ilias.php?baseClass=illmpresentationgui&obj_id=225630&ref_id=35
product, patch
-
schweigertit.de
/en/writeups/php-object-injection-shibboleth-logout.html
technical-description, exploit
-
docu.ilias.de
/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&ref_id=1
release-notes
-
docu.ilias.de
/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&ref_id=1
release-notes
-
docu.ilias.de
/ilias.php?baseClass=ilrepositorygui&cmdNode=wy:ll:6t&cmdClass=ilBlogPostingGUI&cmd=previewFullscreen&ref_id=1
release-notes
-
schweigertit.de
/en/advisories/SIT-2026-002.html
technical-description
Sources
- CVE List CVE-2026-80428
- NVD CVE-2026-80428
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.