CVE-2025-71278
highpriority · track · 0OT risk · elevatedEPSS 0.003 · 18 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.3–8.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-requestcnnvd
- https://xenforo.com/Patchcnnvd
- https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/cnnvd
- https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-requestenisa_euvd
- https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/enisa_euvd
- https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-requestThird Party Advisorynvd
- https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/Release Notesnvd
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