VulnSocial

CVE-2026-65603Disclosure

LOWCVSS 8.7 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

The Grav Login plugin (grav-plugin-login) versions <= 3.8.11 contain a privilege escalation flaw in the authenticated profile self-update handler (processUserProfile(), the update_user task). Unlike the registration handler, this handler does not strip privilege fields ('groups','access') from user-submitted form data before persisting them. When an administrator has added 'groups' and/or 'access' to plugins.login.user_registration.fields and the default 'regular'/DataUser account backend is in use, a low-privilege authenticated user can POST crafted profile form data (e.g. access[admin][super]=true) to escalate to super-admin, enabling admin panel access, scheduler abuse (RCE), and Twig evaluation. Fixed in 3.8.12.

Back to dashboard
0.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-269

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-07-22: 2Patch / Workaround · 2026-07-22: 1Technical Details · 2026-07-22: 207-22
Signal classification1 categories
Disclosure
2100.0%
Referenced assets1 URL
By indicator
Full discourse2 posts
  • Upwind Security MDR@UpwindMDR
    Disclosure

    🚨High - Grav Login Plugin Privilege Escalation via Profile Update (CVE-2026-65603) The Grav Login plugin (<= 3.8.11) profile self-update handler (processUserProfile, the update_user task) fails to strip privilege fields (groups, access) from user-submitted form data before saving, unlike the registration handler. When an admin has added groups/access to the login registration fields and the default DataUser backend is in use, a low-privilege authenticated user can POST crafted data such as access[admin][super]=true to escalate to super-admin. That unlocks the admin panel, scheduler abuse (RCE), and Twig evaluation. CVSS 8.7. 👉Upgrade the Grav Login plugin to 3.8.12.

    Post summary

    The Grav Login plugin (≤3.8.11) allows privilege escalation via unsanitized profile updates, enabling users to become super‑admin and potentially execute arbitrary code; upgrading to 3.8.12 resolves the issue.

    0000073
    254 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-65603 Privilege Escalation in Grav Login Plugin Versions 3.8.11 and Below https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-65603

    Post summary

    The text announces a privilege escalation vulnerability (CVE‑2026‑65603) affecting Grav Login Plugin versions 3.8.11 and older, with details available via a Vulmon link.

    00000116
    4.1K followersView on X

Explore more

Back to dashboard