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CVE-2026-61511

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e91fad89f78d46c3c7d5d093fd17c13a3cbbdf9640d6ae127070b4584cf04bcb
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"vBulletin","vendor":"vBulletin","versions":[{"lessThanOrEqual":"5.7.5","status":"affected","version":"5.0.0","versionType":"semver"},{"lessThanOrEqual":"6.2.1","status":"affected","version":"6.0.0","versionType":"semver"},{"status":"unaffected","version":"6.2.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-95","description":"Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"6.2.1, 6.2.0, 6.1.6 Security Announcement","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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/references/2
{"name":"6.2.2 Release Notes","url":"https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4509404-vbulletin-6-2-2-is-available"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/references/3
{"name":"Karma(In)Security Disclosure","tags":["technical-description","exploit"],"url":"https://karmainsecurity.com/KIS-2026-13"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/references/0
{"name":"SSD Secure Disclosure","tags":["technical-description","exploit"],"url":"https://ssd-disclosure.com/vbulletin-runtime-template-runmaths-preauth-rce/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vbulletin-eval-injection-rce-via-vb5-template-runtime-php"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:73f5ef89c348c54a823124f949d5a8b02144c856e623b912d5d32d1adca9a58c · sha256:633a089bd8add7e2… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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