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CVE-2025-71278

XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes. This affects any customer using OAuth2 clients on any version of XenForo 2.3 prior to 2.3.5, potentially allowing client applications to gain access beyond their intended authorization level.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fb4b3b3f325aadeb0d1b43b7630aea1f497c420462dcf1e1867457c05bbd1954
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":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/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:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","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:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"H…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"product":"XenForo","vendor":"XenForo","versions":[{"lessThan":"2.3.5","status":"affected","version":"2.3.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/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:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","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:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"H…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-863","description":"Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"VulnCheck Advisory: XenForo OAuth2 Unauthorized Scope Request","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-request"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/references/1
{"name":"XenForo 2.3.5 (Includes Security Fix) & Add-ons Released","tags":["vendor-advisory","patch"],"url":"https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f80429857156748e972a28bf9632863461bc30c788e48b4bc1c334f75d7dde18 · sha256:29abb9c19ca846e8… · /containers/cna/references/0

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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