CVE-2026-61511

CRITICAL

vBulletin < 6.2.2 Eval Injection RCE via vb5/template/runtime.php

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-61511. PoCs published by HORKimhab.

AI-analyzed exploit summary This repository contains no actual exploit code, technical details, or vulnerability analysis for CVE-2026-61511. It only includes a README with donation requests, legal disclaimers, and placeholder instructions without any functional PoC or research content.

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.

Exploits (1)

github STUB
by HORKimhab · poc
https://github.com/HORKimhab/CVE-2026-61511

This repository contains no actual exploit code, technical details, or vulnerability analysis for CVE-2026-61511. It only includes a README with donation requests, legal disclaimers, and placeholder instructions without any functional PoC or research content.

Classification
Stub 95%
No auth needed
mistral-large-3 · analyzed Jul 28, 2026 Full analysis →

References (5)

Core 5

Scores

CVSS v3 9.8
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-95
Status published
Products (3)
vBulletin/vBulletin 5.0.0 - 5.7.5
vBulletin/vBulletin 6.0.0 - 6.2.1
vBulletin/vBulletin 6.2.2
Published Jul 27, 2026
Tracked Since Jul 27, 2026