CVE-2025-11346

ILIAS Base64 Decoding unserialize deserialization

State: Published
Severity: 5.3 Medium
Published: Oct 6, 2025
Updated: Feb 24, 2026
Reserved: Oct 6, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X	VulDB
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C	VulDB

Weaknesses

CWE-502 Deserialization
CWE-20 Improper Input Validation

Affected Products

Product	Versions
ILIASn/a	8.0Affected 8.1Affected 8.2Affected 8.3Affected 8.4Affected 8.5Affected 8.6Affected 8.7Affected 8.8Affected 8.9Affected 8.10Affected 8.11Affected 8.12Affected 8.13Affected 8.14Affected 8.15Affected 8.16Affected 8.17Affected 8.18Affected 8.19Affected 8.20Affected 8.21Affected 8.22Affected 8.23Affected 9.0Affected and 18 more versions

References

VDB-327231 | ILIAS Base64 Decoding unserialize deserializationvdb-entrytechnical-description
VDB-327231 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #664892 | ILIAS open source e-Learning e. V. ILIAS >=8.0.0, <=10.1 Deserializationthird-party-advisory
https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-2113government-resource
https://srlabs.de/blog/breaking-ilias-part-2-three-to-rce

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