Paper/Archive/CVE-2026-109321

CVE-2026-109321

getgrav grav-plugin-login-oauth — Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass

EPSS 0.4%CVSS 9.3

critical.is priorityof 100

CVSS 9.3 (CNA)9.3 / 10 × 3027.9 Not in CISA KEV+300.0 EPSS percentile 34.4.344 × 206.9 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Grav Login OAuth plugin (grav-plugin-login-oauth) before 1.4.3 provisions OAuth accounts as ordinary Grav users with a deterministic <provider>.<id> username and an unsalted MD5 hash of the provider identifier as the password, without disabling password login. Unauthenticated remote attackers who learn or guess a provider identifier can reproduce these credentials and log in, gaining administrative control of privileged accounts.

Affected

ProductAffectedFixed inSource

grav-plugin-login-oauth1.0.0-beta.1 – < 1.4.31.4.3CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/getgrav/grav/security/advisories/GHSA-mj8v-hvf6-73gm writeupvulncheck.com/advisories/grav-login-oauth-plugin-before-1.4.3-predictable-local-credentials-authentication-bypass