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CVE-2026-56710— Grav Login Plugin before 1.0.16 Privilege Escalation via Unlock

Quick assessment

Affected
getgrav grav
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 Login 插件在 1.0.16 版本之前，存在一个权限验证缺失漏洞：在处理 解锁操作时，未对目标账户的权限级别进行验证。拥有 权限的攻击者可以清除 （最高权限）账户的登录锁计数器，从而在不具备相应高权限的情况下，绕过最高权限账户的暴力破解保护机制。

CVSS 9.8 · Critical EPSS 0.28% · P20

Affected Version Matrix 2

VendorProduct Version RangeStatus
getgrav grav < 1.0.16 affected
1.0.16 unaffected
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I. Basic Information for CVE-2026-56710

Vulnerability Information
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Vulnerability Title
Grav Login Plugin before 1.0.16 Privilege Escalation via Unlock
Source: CVE Program / CVE List V5
Vulnerability Description
Grav Login plugin versions before 1.0.16 fail to validate the target account's privilege level in the onApiUserListRowAction unlock handler. An attacker with api.users.write permission can clear login lockout counters on admin.super accounts, removing brute-force protection from the highest-privilege accounts without requiring equivalent permissions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getgrav grav 0 ~ 1.0.16 -

II. Public POCs for CVE-2026-56710

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III. Intelligence Information for CVE-2026-56710

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Vendor Advisories for CVE-2026-56710 (2)

Same Patch Batch · getgrav · 2026-08-25 · 15 CVEs total

CVE-2026-75574 8.8 HIGH Grav before 4.2.2 Remote Code Execution via Email Twig
CVE-2026-72696 8.4 HIGH Grav CMS before 2.0.16 Symlink Following via createLockFile
CVE-2026-72695 8.1 HIGH Grav before 2.0.16 Path Traversal via MediaUploadTrait deleteFile
CVE-2026-56707 7.7 HIGH Grav Flex Objects 1.4.0 through 1.4.7 Authorization Bypass via Shortcode
CVE-2026-72700 7.5 HIGH Grav before 3.9.1 Timing Attack via Non-Constant-Time Token Comparison
CVE-2026-76846 7.5 HIGH Grav before 2.0.16 Information Disclosure via Twig Sandbox
CVE-2026-56709 7.5 HIGH Grav before 3.9.2 Host Header Injection via sendInvitationEmail
CVE-2026-72698 6.5 MEDIUM Grav CMS before 2.0.16 Information Disclosure via Twig Sandbox Bypass
CVE-2026-72697 6.5 MEDIUM Grav CMS before 2.0.16 Path Traversal via media_directory
CVE-2026-76839 6.5 MEDIUM Grav before 2.0.16 Information Disclosure via offsetGet
CVE-2026-72702 5.4 MEDIUM Grav CMS before 2.0.16 Origin Validation Bypass via Referer
CVE-2026-72699 5.3 MEDIUM Grav Login Plugin before 3.9.1 Email Enumeration via Registration
CVE-2026-56708 5.3 MEDIUM Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
CVE-2026-72701 3.7 LOW Grav CMS before 2.0.16 Timing Attack via verifyNonce

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-863

V. Comments for CVE-2026-56710

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