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[NEW] [critical] vBulletin: Vulnerability allows code execution

criticalpublic exploitCVE-2026-61511
A remote, anonymous attacker can exploit a vulnerability in vBulletin to execute arbitrary program code.

CSIRTS triage

vendor: vBulletinproduct: vBulletinRemote code execution
What
A vulnerability in vBulletin allows remote, anonymous attackers to execute arbitrary program code.
Who is affected
Deployments of vBulletin.
Urgency
Remediation is critical due to the high risk of remote code execution.
Action
Patch vBulletin to the latest version immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
critical
Published
2026-07-28
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2528

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-61511coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for vBulletin

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories