CVE-2026-61511
CRITICAL
9,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
CRITICAL
9,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Description
AI Translation Available
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.
95
Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
IncompleteCommon Consequences
Security Scopes Affected:
Confidentiality
Access Control
Integrity
Availability
Other
Non-Repudiation
Potential Impacts:
Read Files Or Directories
Read Application Data
Bypass Protection Mechanism
Gain Privileges Or Assume Identity
Execute Unauthorized Code Or Commands
Hide Activities
Applicable Platforms
Languages:
Java, JavaScript, Python, Perl, PHP, Ruby, Interpreted
Technologies:
AI/ML
https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcemen…
https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcemen…
https://karmainsecurity.com/KIS-2026-13
https://ssd-disclosure.com/vbulletin-runtime-template-runmaths-preauth-rce/
https://www.vulncheck.com/advisories/vbulletin-eval-injection-rce-via-vb5-templ…