VULNERABILITY INTELLIGENCE
CVE-2026-61511
CVSS score9.3 CRITICAL
EPSS probability5.61%
CISA KEVNot currently listed
Published2026-07-27
Last modified2026-10-14
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.
Weakness classification
- CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')