Vulnerability in Getgrav Grav-Plugin-Login-Oauth
CVE-2026-109321
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.
Published .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/getgrav/grav/security/advisories/GHSA-mj8v-hvf6-73gm (vendor-advisory, third-party-advisory)
- www.vulncheck.com/advisories/grav-login-oauth-plugin-before-1.4.3-predictable-l… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109321?
- CVE-2026-109321 is a critical-severity vulnerability in Getgrav Grav-Plugin-Login-Oauth, classified under CWE-1391. CVSS score: 9.1/10. Published 2026-10-12.
- How severe is CVE-2026-109321?
- Critical severity. CVSS v3 base score is 9.1 out of 10.