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Grav Login Plugin CVE-2026-62236

| EUVDEUVD-2026-45082 LOW
Cross-Site Request Forgery (CSRF) (CWE-352)
2026-07-17 VulnCheck GHSA-f4c6-8fcq-j58x
CSRF Grav
2.3
CVSS 4.0 · Vendor: VulnCheck

Severity by source

Vendor (VulnCheck) PRIMARY
2.3 LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.4 MEDIUM

UI:R required as victim must navigate; PR:N since attacker holds no account; C:N as no data is exposed; I:L and A:L for TOTP invalidation impact only.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
4.0 AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

2
Patch available
Jul 17, 2026 - 02:32 EUVD
Analysis Generated
Jul 17, 2026 - 01:02 vuln.today

DescriptionCVE.org

grav-plugin-login before 3.8.11 contains a cross-site request forgery (CSRF) vulnerability in the login.regenerate2FASecret frontend task, which regenerates and persists a new TOTP secret for the authenticated session user without any anti-CSRF nonce or Origin/Referer check. Because Grav core dispatches the task from the GET 'task:' URI parameter and the default session cookie is SameSite=Lax, an attacker can lure a logged-in victim to an off-site page that performs a top-level GET navigation, rotating the victim's TOTP secret so their enrolled authenticator no longer matches the server, effectively forcing 2FA re-enrollment. Sites configured with session.samesite: Strict are not affected.

AnalysisAI

CSRF in grav-plugin-login before 3.8.11 allows a remote unauthenticated attacker to rotate a logged-in victim's TOTP secret by luring them to an attacker-controlled page that performs a top-level GET navigation to the Grav site's regenerate2FASecret task endpoint. Because Grav dispatches frontend tasks via GET URI parameters and the default SameSite=Lax session cookie policy permits cross-origin top-level GET navigations to carry cookies, the victim's authenticator app is silently invalidated, forcing 2FA re-enrollment - though the attacker gains no account access. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker identifies logged-in Grav victim
Delivery
Deliver malicious link or auto-redirect to ?task=login.regenerate2FASecret
Exploit
Victim browser performs top-level GET (SameSite=Lax sends session cookie)
Execution
Server regenerates and persists new TOTP secret
Persist
Victim's authenticator app codes become invalid
Impact
Victim forced to re-enroll 2FA
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Vulnerability AssessmentAI

Exploitation The victim must be actively authenticated to the Grav site with a valid session cookie at the time of the attack. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 2.3 accurately reflects the bounded real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker hosts a web page that automatically redirects visitors to a URL such as https://target-grav-site.com/?task=login.regenerate2FASecret via a standard HTML link or JavaScript window.location assignment. When a user who is currently logged in to the Grav site visits the attacker's page and triggers this top-level GET navigation, the browser attaches the victim's session cookie under the default SameSite=Lax policy, causing the Grav server to execute the TOTP secret rotation in the victim's authenticated session. …
Remediation Upgrade grav-plugin-login to version 3.8.11 or later, which is the vendor-released patch confirmed by the security advisory at https://github.com/getgrav/grav/security/advisories/GHSA-4px8-7p53-282r. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-62236 vulnerability details – vuln.today
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