CVE-2026-85602
Grav Form Plugin before 9.1.20 reCAPTCHA v3 Authentication Bypass
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
The Grav Form plugin (getgrav/grav-plugin-form) versions 8.0.6 through 9.1.19 select the reCAPTCHA version to validate based solely on which response field key is present in the submitted payload. On a site configured for reCAPTCHA v3, an anonymous attacker can place their v3 token under the v2 field name (g-recaptcha-response instead of token), causing validation to use the v2 branch, which never applies the score threshold or verifies the expected action. This results in a complete bypass of reCAPTCHA v3 bot protection. The issue is fixed in version 9.1.20.
| CWE | CWE-807 |
| Vendor | getgrav |
| Product | grav-plugin-form |
| Published | Sep 4, 2026 |
| Last Updated | Sep 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
getgrav / grav-plugin-form
0 < 9.1.20
References
Credits
🔍 arpitjain099