CVE-2026-65603

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-22. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jul 22, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Grav Login Plugin 3.8.11 Privilege Escalation via Profile Update | Advisories | VulnCheck

https://www.vulncheck.com/advisories/grav-login-plugin-privilege-escalation-via-profile-update
github Patch Available🟡 PoC Available

Privilege escalation via profile self-update (update_user) mass-assignment of groups/access on default backend · Advisory · getgrav/grav · GitHub

https://github.com/getgrav/grav/security/advisories/GHSA-h33v-82r9-v8pm

Vendor Advisories for CVE-2026-65603(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 86× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 189 total refreshes for this CVE.

  1. 2026-09-14 10:17 UTCGHSA enrichment
  2. 2026-09-13 22:26 UTCEG score recompute
  3. 2026-09-13 22:26 UTCGHSA enrichment
  4. 2026-09-13 08:48 UTCGHSA enrichment
  5. 2026-09-12 21:02 UTCEG score recompute
  6. 2026-09-12 21:02 UTCGHSA enrichment
  7. 2026-09-12 09:16 UTCGHSA enrichment
  8. 2026-09-11 21:11 UTCEG score recompute
  9. 2026-09-11 21:11 UTCGHSA enrichment
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 09:37 UTCEPSS rescore
  12. 2026-09-11 09:26 UTCGHSA enrichment
  13. 2026-09-10 21:40 UTCEG score recompute
  14. 2026-09-10 21:40 UTCGHSA enrichment
  15. 2026-09-09 09:18 UTCEG score recompute
  16. 2026-09-09 09:18 UTCGHSA enrichment
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 21:43 UTCEG score recompute
  19. 2026-09-07 21:43 UTCGHSA enrichment
  20. 2026-09-07 16:01 UTCEPSS rescore
  21. 2026-09-06 13:47 UTCEPSS rescore
  22. 2026-09-06 08:44 UTCGHSA enrichment
  23. 2026-09-05 19:35 UTCEG score recompute
  24. 2026-09-05 19:35 UTCGHSA enrichment
  25. 2026-09-05 15:31 UTCEPSS rescore
Show 75 more
  1. 2026-09-05 07:16 UTCEG score recompute
  2. 2026-09-05 07:16 UTCGHSA enrichment
  3. 2026-09-04 13:56 UTCEG score recompute
  4. 2026-09-04 13:56 UTCGHSA enrichment
  5. 2026-09-04 05:07 UTCEPSS rescore
  6. 2026-09-02 14:12 UTCEPSS rescore
  7. 2026-09-01 23:41 UTCEG score recompute
  8. 2026-09-01 23:41 UTCGHSA enrichment
  9. 2026-09-01 13:54 UTCEPSS rescore
  10. 2026-09-01 04:40 UTCEPSS rescore
  11. 2026-08-31 00:30 UTCEG score recompute
  12. 2026-08-31 00:30 UTCGHSA enrichment
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 12:44 UTCEG score recompute
  15. 2026-08-30 12:44 UTCGHSA enrichment
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-30 00:56 UTCEG score recompute
  18. 2026-08-30 00:56 UTCGHSA enrichment
  19. 2026-08-28 21:42 UTCEPSS rescore
  20. 2026-08-27 22:05 UTCEG score recompute
  21. 2026-08-27 22:05 UTCGHSA enrichment
  22. 2026-08-27 10:19 UTCGHSA enrichment
  23. 2026-08-26 22:28 UTCEG score recompute
  24. 2026-08-26 22:28 UTCGHSA enrichment
  25. 2026-08-26 14:47 UTCEPSS rescore
  26. 2026-08-26 10:43 UTCGHSA enrichment
  27. 2026-08-25 22:19 UTCEG score recompute
  28. 2026-08-25 22:19 UTCGHSA enrichment
  29. 2026-08-25 13:49 UTCEPSS rescore
  30. 2026-08-25 10:17 UTCGHSA enrichment
  31. 2026-08-24 22:32 UTCEG score recompute
  32. 2026-08-24 22:32 UTCGHSA enrichment
  33. 2026-08-24 10:47 UTCEG score recompute
  34. 2026-08-24 10:47 UTCGHSA enrichment
  35. 2026-08-23 22:57 UTCGHSA enrichment
  36. 2026-08-23 10:53 UTCEG score recompute
  37. 2026-08-23 10:53 UTCGHSA enrichment
  38. 2026-08-23 00:19 UTCEPSS rescore
  39. 2026-08-22 23:08 UTCGHSA enrichment
  40. 2026-08-22 11:23 UTCEG score recompute
  41. 2026-08-22 11:23 UTCGHSA enrichment
  42. 2026-08-21 23:49 UTCEPSS rescore
  43. 2026-08-21 23:37 UTCEG score recompute
  44. 2026-08-21 23:37 UTCGHSA enrichment
  45. 2026-08-21 11:52 UTCGHSA enrichment
  46. 2026-08-21 00:07 UTCEG score recompute
  47. 2026-08-21 00:07 UTCGHSA enrichment
  48. 2026-08-20 22:56 UTCEPSS rescore
  49. 2026-08-20 12:21 UTCGHSA enrichment
  50. 2026-08-20 00:36 UTCEG score recompute
  51. 2026-08-20 00:36 UTCGHSA enrichment
  52. 2026-08-19 17:04 UTCEPSS rescore
  53. 2026-08-19 12:50 UTCGHSA enrichment
  54. 2026-08-19 01:02 UTCEG score recompute
  55. 2026-08-19 01:02 UTCGHSA enrichment
  56. 2026-08-18 13:48 UTCEPSS rescore
  57. 2026-08-18 13:16 UTCGHSA enrichment
  58. 2026-08-18 01:28 UTCEG score recompute
  59. 2026-08-18 01:28 UTCGHSA enrichment
  60. 2026-08-17 13:47 UTCEPSS rescore
  61. 2026-08-17 12:36 UTCGHSA enrichment
  62. 2026-08-17 00:50 UTCEG score recompute
  63. 2026-08-17 00:50 UTCGHSA enrichment
  64. 2026-08-16 14:56 UTCEPSS rescore
  65. 2026-08-16 13:05 UTCEG score recompute
  66. 2026-08-16 13:05 UTCGHSA enrichment
  67. 2026-08-16 01:20 UTCGHSA enrichment
  68. 2026-08-15 13:35 UTCGHSA enrichment
  69. 2026-08-15 01:46 UTCEG score recompute
  70. 2026-08-15 01:46 UTCGHSA enrichment
  71. 2026-08-15 01:30 UTCEPSS rescore
  72. 2026-08-14 14:02 UTCGHSA enrichment
  73. 2026-08-14 02:16 UTCEG score recompute
  74. 2026-08-14 02:16 UTCGHSA enrichment
  75. 2026-08-13 22:00 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-65603?
CVE-2026-65603 is a high vulnerability published on July 22, 2026. 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 updateuser task). Unlike the registration handler, this handler does not strip privilege fields ('groups','access') from…
When was CVE-2026-65603 disclosed?
CVE-2026-65603 was first published in the National Vulnerability Database on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65603 actively exploited?
CVE-2026-65603 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 62.6% of all scored CVEs.
What is the CVSS score of CVE-2026-65603?
CVE-2026-65603 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-65603?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65603, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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