CVE WatchNov 3, 2026

CVE-2026-61511

vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contains an eval injection vulnerability in the vB5_Template_Runtime::runMaths() method wi

CVSS

9.8

Critical

EPSS

5.6%

p93

KEV

—

Exploit Today

0-100

Published: Jul 27, 2026 · Last modified: Nov 3, 2026 · CWE-95

EPSS · 30d

5.6%EPSS · 30 days5.6%

2026-10-062026-11-02

Technical description

vBulletin 5.x through 5.7.5 and 6.x through 6.2.1 contains an eval injection vulnerability in the vB5_Template_Runtime::runMaths() method within the template runtime that allows unauthenticated remote attackers to execute arbitrary PHP code by supplying crafted input through the pagenav[pagenumber] parameter. Attackers can exploit the insufficiently restrictive regex filter by using phpfuck-style encoding with permitted characters to inject and execute arbitrary PHP code via the unauthenticated ajax/render template route without any authentication.

Official references

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