CVE-2025-11346: ILIAS Base64 Decoding unserialize deserialization

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-06 · updated 2026-10-19
Weakness: CWE-20

Description

A vulnerability has been found in ILIAS up to 8.23/9.13/10.1. This affects the function unserialize of the component Base64 Decoding Handler. Such manipulation of the argument f_settings leads to deserialization. It is possible to launch the attack remotely. Upgrading to version 8.24, 9.14 and 10.2 is able to mitigate this issue. It is advisable to upgrade the affected component.

Affected products

ILIAS: 8.23, 9.13, 10.1

References

https://vuldb.com/?ctiid.327231
https://vuldb.com/?id.327231
https://vuldb.com/?submit.664892
https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-2113
https://srlabs.de/blog/breaking-ilias-part-2-three-to-rce

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