CVE-2025-46171 — MEDIUM (5.4)

Vulnerability Description

vBulletin 3.8.7 is vulnerable to a denial-of-service condition via the misc.php?do=buddylist endpoint. If an authenticated user has a sufficiently large buddy list, processing the list can consume excessive memory, exhausting system resources and crashing the forum.

CVSS Score

5.4

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Vbulletin	Vbulletin	3.8.7

Related Weaknesses (CWE)

CWE-400

References

http://vbulletin.comProduct
https://github.com/oiyl/CVE-2025-46171ExploitMitigationThird Party Advisory

FAQ

What is CVE-2025-46171?

CVE-2025-46171 is a vulnerability with a CVSS score of 5.4 (MEDIUM). vBulletin 3.8.7 is vulnerable to a denial-of-service condition via the misc.php?do=buddylist endpoint. If an authenticated user has a sufficiently large buddy list, processing the list can consume exc...

How severe is CVE-2025-46171?

CVE-2025-46171 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-46171?

Check the references section above for vendor advisories and patch information. Affected products include: Vbulletin Vbulletin.