CVE Catalog

CVE-2026-80428

CriticalCVSS 9.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Very high risk
4.46%

91th percentile - higher than 91% of all known CVEs

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.

Risk Assessment

The vulnerability allows complete takeover of the ILIAS server without authentication, potentially leading to data theft, content modification, and further attacks on the infrastructure.

Recommendation

Immediately upgrade ILIAS to version 9.22, 10.10, or 11.3 or later to remediate the vulnerability.

Other vulnerabilities in ILIAS

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS