CVE-2023-25135

· CRITICALModified

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CVSS v3.1

9.8

EPSS

23.93%

Published

Feb 3, 2023

Modified

Mar 26, 2025

Public PoC / Exploit (2)

All weaponized →

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Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-502CWE-502

Affected Products (3)

vbulletin · vbulletinvulnerable

References (4)

https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4473890-vbulletin-5-6-9-security-patch

Release NotesVendor Advisory

https://www.ambionics.io/blog/vbulletin-unserializable-but-unreachable

ExploitTechnical DescriptionThird Party Advisory

https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4473890-vbulletin-5-6-9-security-patch

Release NotesVendor Advisory

https://www.ambionics.io/blog/vbulletin-unserializable-but-unreachable

ExploitTechnical DescriptionThird Party Advisory

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