{"id":"CVE-2026-61511","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-61511","generatedAt":"2026-10-28T02:19:42.178Z","title":"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…","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.","published":"2026-07-27T14:16:59.000Z","lastModified":"2026-10-14T04:18:25.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":9.3,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-95"],"affected":[],"epss":{"score":0.05607,"percentile":0.92859,"date":"2026-10-26","history":[{"date":"2026-09-24","score":0.05607,"percentile":0.92622}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (5.61%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-24T00:00:00.000Z","detail":{"to":0.05607,"from":0.70766,"percentile":0.92622},"summary":"EPSS moved from 70.8% to 5.6% probability of exploitation in the next thirty days."}],"references":[{"url":"https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509358-security-patch-released-for-vbulletin-6-2-1-6-2-0-and-6-1-6","source":"disclosure@vulncheck.com"},{"url":"https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509404-vbulletin-6-2-2-is-available","source":"disclosure@vulncheck.com"},{"url":"https://karmainsecurity.com/KIS-2026-13","source":"disclosure@vulncheck.com"},{"url":"https://ssd-disclosure.com/vbulletin-runtime-template-runmaths-preauth-rce/","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/vbulletin-eval-injection-rce-via-vb5-template-runtime-php","source":"disclosure@vulncheck.com"},{"url":"http://seclists.org/fulldisclosure/2026/Aug/29","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-61511","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}