CVE-2023-25135

State: Published
Severity: 9.8 Critical
Published: Feb 3, 2023
Updated: Mar 26, 2025
Reserved: Feb 3, 2023

Description

vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary code via a crafted HTTP request that triggers deserialization. This occurs because verify_serialized checks that a value is serialized by calling unserialize and then checking for errors. The fixed versions are 5.6.7 PL1, 5.6.8 PL1, and 5.6.9 PL1.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-502 Deserialization of Untrusted Data

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://www.ambionics.io/blog/vbulletin-unserializable-but-unreachable
https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4473890-vbulletin-5-6-9-security-patch

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