ILIAS PHP Object Injection via Shibboleth Logout
Summary
| CVE | CVE-2026-80428 |
|---|---|
| State | PUBLISHED |
| Assigner | VulnCheck |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-26 16:16:45 UTC |
| Updated | 2026-09-30 17:16:50 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 9.3 CRITICAL from [email protected]
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
EPSS: 0.023320000 probability, percentile 0.825880000 (date 2026-09-13)
Problem Types: CWE-502 | CWE-502 Deserialization of Untrusted Data
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 9.3 | CRITICAL | 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/C... |
| 4.0 | CNA | CVSS | 9.3 | CRITICAL | 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 |
| 3.1 | [email protected] | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
NoneUser Interaction
NoneConfidentiality
HighIntegrity
HighAvailability
HighSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS: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
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | ILIAS-eLearning E.V. | ILIAS | affected 9.0 9.22 custom | Not specified |
| CNA | ILIAS-eLearning E.V. | ILIAS | affected 10.0 10.10 custom | Not specified |
| CNA | ILIAS-eLearning E.V. | ILIAS | affected 11.0 11.3 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| docu.ilias.de/ilias.php | [email protected] | docu.ilias.de | |
| docu.ilias.de/ilias.php | [email protected] | docu.ilias.de | |
| docu.ilias.de/ilias.php | [email protected] | docu.ilias.de | |
| docu.ilias.de/ilias.php | [email protected] | docu.ilias.de | |
| docu.ilias.de/ilias.php | [email protected] | docu.ilias.de | |
| schweigertit.de/en/writeups/php-object-injection-shibboleth-logout.html | [email protected] | schweigertit.de | |
| docu.ilias.de/ilias.php | [email protected] | docu.ilias.de | |
| schweigertit.de/en/advisories/SIT-2026-002.html | [email protected] | schweigertit.de | |
| github.com/ILIAS-eLearning/ILIAS | MITRE | github.com | |
| github.com/ILIAS-eLearning/ILIAS/commit/f36934a6f937d0fe837ca6e642986458... | MITRE | github.com | |
| www.vulncheck.com/advisories/ilias-before-9.22-10.10-and-11.3-unauthenticated-p... | MITRE | www.vulncheck.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: André Schweigert (en)
There are currently no legacy QID mappings associated with this CVE.