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CVE-2026-109312— Grav Login Plugin 2.7.0 before 3.9.9 2FA Bypass via Profile Update Form

Quick assessment

Affected
getgrav grav-plugin-login
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grav 登录插件（Grav Login plugin）在版本 2.7.0 至 3.9.9 之间存在一个认证绕过漏洞，位于 函数中。该函数仅验证了会话用户是否存在，但未检查前端两步验证（2FA）会话是否已完全授权。攻击者若掌握受害者的密码，并能在无访问规则限制的情况下发布一个页面表单，则可以在未完成两步验证的情况下调用 函数，从而禁用 属性，进而接管该账户。

CVSS 8.1 · High EPSS 0.35% · P27

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav-plugin-login 2.7.0< 3.9.9 affected
3.9.9 unaffected
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I. Basic Information for CVE-2026-109312

Vulnerability Information
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Vulnerability Title
Grav Login Plugin 2.7.0 before 3.9.9 2FA Bypass via Profile Update Form
Source: CVE Program / CVE List V5
Vulnerability Description
Grav Login plugin 2.7.0 before 3.9.9 contains an authentication bypass in processUserProfile(), which checks that the session user exists but not that a pending front-end 2FA session is fully authorized. Attackers with a victim's password who can publish a page form without an access rule can invoke update_user before completing 2FA to disable twofa_enabled and take over the account.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav-plugin-login 2.7.0 ~ 3.9.9 -

II. Public POCs for CVE-2026-109312

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III. Intelligence Information for CVE-2026-109312

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Vendor Advisories for CVE-2026-109312 (1)

Other References for CVE-2026-109312 (1)

Same Patch Batch · getgrav · 2026-10-12 · 14 CVEs total

CVE-2026-109321 9.1 CRITICAL Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass
CVE-2026-109313 8.1 HIGH Grav Login Plugin 2.7.0 before 3.9.9 2FA Bypass via Remember-Me Cookie
CVE-2026-109325 7.5 HIGH Grav from 2.0.22 before 2.1.7 Clockwork Profiler Authentication Bypass via Proxy
CVE-2026-109326 7.5 HIGH Grav before 2.1.7 Information Disclosure via Nested .git Directories
CVE-2026-109314 7.3 HIGH Grav Login Plugin 1.2.0 before 3.9.9 Password Reset Token Disclosure via Reset Page
CVE-2026-109317 7.2 HIGH Grav API Plugin before 1.0.36 Privilege Escalation via Scalar Access Grants
CVE-2026-109315 6.5 MEDIUM Grav 2.0.22 before 2.1.7 Clockwork Debugger Token Disclosure via Twig Sandbox
CVE-2026-109324 6.5 MEDIUM Grav before 2.1.7 Memory Exhaustion via Oversized Image Transforms
CVE-2026-109316 6.5 MEDIUM Grav Data Manager 1.4.0 through 1.4.5 Unauthenticated File Deletion via Admin
CVE-2026-109322 6.1 MEDIUM Grav Guestbook before 0.5.2 Stored XSS via AJAX Pagination and Admin Views
CVE-2026-109320 5.4 MEDIUM Grav API Plugin before 1.0.36 Disabled Account Session Access Bypass
CVE-2026-109323 5.3 MEDIUM Grav Star Ratings 2.0.1 through 2.0.3 Missing Server-Side vote_access Authorization
CVE-2026-109319 4.3 MEDIUM Grav Guestbook Plugin 0.5.0 and 0.5.1 Missing Authorization and CSRF in Moderation

IV. Related Vulnerabilities

Same product: grav-plugin-login
Same vendor: getgrav
Same weakness: CWE-287

V. Comments for CVE-2026-109312

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