---
id: CVE-2026-100667
title: >-
  grav-plugin-login (the Grav CMS Login plugin) versions >= 3.8.7 and < 3.9.7
  allow the two-factor authentication challenge to be bypassed for content gated
  by the authenticated() Twig function or the [authenticated] shortcode
summary: >-
  grav-plugin-login (the Grav CMS Login plugin) versions >= 3.8.7 and < 3.9.7
  allow the two-factor authentication challenge to be bypassed for content gated
  by the authenticated() Twig function or the [authenticated] shortcode. On
  sites wi…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-304
vendor: getgrav
product: grav
affected:
  - grav >= 3.8.7 < 3.9.7
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T14:16:50.223'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100667'
references:
  - url: 'https://github.com/getgrav/grav/security/advisories/GHSA-636m-8598-45r9'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/grav-plugin-login-3.8.7-through-3.9.6-two-factor-authentication-bypass
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T13:33:20.913Z'
---

## Overview

grav-plugin-login (the Grav CMS Login plugin) versions >= 3.8.7 and < 3.9.7 allow the two-factor authentication challenge to be bypassed for content gated by the authenticated() Twig function or the [authenticated] shortcode. On sites with 2FA enabled, Login::isAuthenticated() checked only the session flag indicating that the password step had succeeded, not the flag indicating that login had completed, so a session sitting at the 2FA code prompt was treated as fully authenticated. An attacker who knows a member's password but cannot answer that member's second factor can therefore read member-only content rendered by the no-argument authenticated() or group authenticated(null, 'group') forms and by [authenticated]; the inverse [guest] shortcode is likewise evaluated too early. Impact is limited to disclosure of that content: the attacker does not obtain a completed session, cannot access pages protected by an access: rule, and cannot act as the user. The authenticated('some.permission') form, which goes through UserObject::authorize(), is not affected. Fixed in grav-plugin-login 3.9.7.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.