MCPHub before 1.0.32 OAuth 2.0 Authentication Bypass
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.6epss 0.3%
exploitation probability
0.3%top 77% of all CVEs
observed exploitation
nono source reports it
MCPHub before 1.0.32 contains an authentication bypass vulnerability in its embedded OAuth 2.0 authorization server where client authentication is disabled by default and PKCE enforcement is optional. Attackers who obtain an authorization code through interception can redeem it for access tokens without providing a client secret or PKCE verifier, gaining access to victim accounts and their privileges.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
samanhappy · mcphubReferences
https://github.com/samanhappy/mcphub/blob/v1.0.31/src/services/oauthServerService.ts#L26-L38https://github.com/samanhappy/mcphub/commit/e927620cd1a80e8691213b01eb8cd6ffa1a66e9fhttps://github.com/samanhappy/mcphub/releases/tag/v1.0.32https://github.com/samanhappy/mcphub/security/advisories/GHSA-3m7m-37xf-xp9xhttps://www.vulncheck.com/advisories/mcphub-before-1.0.32-oauth-2.0-authentication-bypass