CVE-2026-109321
Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass
- State
- Published
- Severity
- 9.3 Critical
- Published
- Oct 12, 2026
- Updated
- Oct 18, 2026
- Reserved
- Oct 12, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS: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 |
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-1391 Use of Weak Credentials
Affected Products
| Product | Versions |
|---|---|
grav-plugin-login-oauthgetgrav |
|
References
- GitHub Security Advisory (GHSA-mj8v-hvf6-73gm)vendor-advisorythird-party-advisory
- VulnCheck Advisory: Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypassthird-party-advisory
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