CVE-2026-85602Grav Form Plugin before 9.1.20 reCAPTCHA v3 Authentication Bypass
Updated under an hour ago ()
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It affects getgrav grav-plugin-form. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-807
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
getgrav grav-plugin-form getgrav:grav_plugin_form (from the name) | before 9.1.20; 9.1.20 not affected | CNA record |
References
- https://github.com/getgrav/grav/security/advisories/GHSA-89j6-8h38-2cc3vendor-advisory
- https://www.vulncheck.com/advisories/grav-form-plugin-before-9.1.20-recaptcha-v3-authentication-bypassthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.