Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N L N N N H H H 9.3 .0171 75.6 —
AFFECTED Product Versions Fixed vBulletin 5.0.0 – 6.2.2
TIMELINE Jul 10 Reserved by VulnCheck Jul 27 Published (CNA: VulnCheck) Jul 28 EXPLOIT PUBLISHED — CVE-2026-61511 (vBulletin). Public exploit reference added.
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.
| Date | Event | Detail |
|---|---|---|
| July 10, 2026 | Reserved | Reserved by VulnCheck |
| July 27, 2026 | Published | Published (CNA: VulnCheck) |
| July 28, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-61511 (vBulletin). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| vBulletin | vBulletin | — | 5.0.0 | 6.2.2 |
Authoritative record: CVE-2026-61511 at cve.org
Vendors: vbulletin
Weaknesses: CWE-95
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-61511 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.