CVE-2025-46171

Name: CVE-2025-46171
Creator: NVD / NIST
Published: 2025-07-23T16:15:26.423+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2025-46171 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.25%

16.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Vbulletin	Vbulletin	3.8.7

References

http://vbulletin.comProduct
https://github.com/oiyl/CVE-2025-46171Exploit, Mitigation, Third Party Advisory

Timeline

Published: Jul 23, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-46171?

How severe is CVE-2025-46171?

CVE-2025-46171 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2025-46171?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-46171?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST