CVE-2026-56381

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

Score 4.8 from GitHub Security Advisory published 2026-06-21. a secondary CVSS source baseline 4.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: Elevated riskExposed: 0

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

Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity48% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

June 21, 2026

Last Modified

June 23, 2026

Advisory Details (2)

Auto-updated Jun 23, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Craft CMS - Stored XSS via User Group Name in User Permissions Page | Advisories | VulnCheck

https://www.vulncheck.com/advisories/craft-cms-stored-xss-via-user-group-name-in-user-permissions-page
github Patch Available🟡 PoC Available

Stored XSS via User Group Name in User Permissions Page · Advisory · craftcms/cms · GitHub

https://github.com/craftcms/cms/security/advisories/GHSA-g3hp-vvqf-8vw6

Vendor Advisories for CVE-2026-56381(1)

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

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
craftcms/cms5.0.0 ... 5.8.9 (143 versions)5.8.22—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 61× 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 138 total refreshes for this CVE.

  1. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-25 01:37 UTCEG score recompute
  3. 2026-08-24 00:16 UTCEG score recompute
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-22 22:56 UTCEG score recompute
  6. 2026-08-21 23:49 UTCEPSS rescore
  7. 2026-08-21 09:26 UTCEG score recompute
  8. 2026-08-20 22:55 UTCEPSS rescore
  9. 2026-08-20 07:53 UTCEG score recompute
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 05:47 UTCEG score recompute
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-17 08:27 UTCEG score recompute
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 07:07 UTCEG score recompute
  17. 2026-08-16 02:14 UTCEPSS rescore
  18. 2026-08-15 05:47 UTCEG score recompute
  19. 2026-08-15 01:30 UTCEPSS rescore
  20. 2026-08-14 04:26 UTCEG score recompute
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 03:05 UTCEG score recompute
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-12 01:45 UTCEG score recompute
  25. 2026-08-11 00:24 UTCEG score recompute
Show 75 more
  1. 2026-08-11 00:00 UTCEPSS rescore
  2. 2026-08-09 23:03 UTCEG score recompute
  3. 2026-08-09 13:46 UTCEPSS rescore
  4. 2026-08-08 21:43 UTCEG score recompute
  5. 2026-08-08 16:37 UTCEPSS rescore
  6. 2026-08-07 20:22 UTCEG score recompute
  7. 2026-08-06 19:02 UTCEG score recompute
  8. 2026-08-06 19:02 UTCGHSA enrichment
  9. 2026-08-06 13:47 UTCEPSS rescore
  10. 2026-08-05 19:17 UTCEPSS rescore
  11. 2026-08-05 17:41 UTCGHSA enrichment
  12. 2026-08-04 15:39 UTCEG score recompute
  13. 2026-08-04 15:39 UTCGHSA enrichment
  14. 2026-08-04 15:10 UTCEPSS rescore
  15. 2026-08-04 10:39 UTCEPSS rescore
  16. 2026-08-03 14:19 UTCEG score recompute
  17. 2026-08-03 14:19 UTCGHSA enrichment
  18. 2026-08-03 10:36 UTCEPSS rescore
  19. 2026-08-02 09:09 UTCEG score recompute
  20. 2026-08-02 09:09 UTCGHSA enrichment
  21. 2026-08-02 02:27 UTCEPSS rescore
  22. 2026-08-01 07:49 UTCEG score recompute
  23. 2026-08-01 07:49 UTCGHSA enrichment
  24. 2026-08-01 04:16 UTCEPSS rescore
  25. 2026-07-31 04:11 UTCEG score recompute
  26. 2026-07-31 04:11 UTCGHSA enrichment
  27. 2026-07-30 16:28 UTCEPSS rescore
  28. 2026-07-30 02:49 UTCEG score recompute
  29. 2026-07-30 02:49 UTCGHSA enrichment
  30. 2026-07-30 01:30 UTCEPSS rescore
  31. 2026-07-30 01:30 UTCEPSS rescore
  32. 2026-07-29 01:28 UTCEG score recompute
  33. 2026-07-29 01:27 UTCGHSA enrichment
  34. 2026-07-28 15:37 UTCEPSS rescore
  35. 2026-07-27 18:00 UTCEG score recompute
  36. 2026-07-27 18:00 UTCGHSA enrichment
  37. 2026-07-26 16:18 UTCEG score recompute
  38. 2026-07-26 16:18 UTCGHSA enrichment
  39. 2026-07-26 14:54 UTCEPSS rescore
  40. 2026-07-25 14:18 UTCEPSS rescore
  41. 2026-07-24 14:18 UTCEPSS rescore
  42. 2026-07-23 14:18 UTCEPSS rescore
  43. 2026-07-23 03:20 UTCEG score recompute
  44. 2026-07-22 14:08 UTCEPSS rescore
  45. 2026-07-21 15:25 UTCEPSS rescore
  46. 2026-07-20 17:08 UTCEPSS rescore
  47. 2026-07-19 14:31 UTCEPSS rescore
  48. 2026-07-19 14:31 UTCEPSS rescore
  49. 2026-07-18 10:04 UTCEPSS rescore
  50. 2026-07-17 01:12 UTCGHSA enrichment
  51. 2026-07-16 17:03 UTCEPSS rescore
  52. 2026-07-15 23:51 UTCGHSA enrichment
  53. 2026-07-15 16:57 UTCEPSS rescore
  54. 2026-07-15 16:57 UTCEPSS rescore
  55. 2026-07-15 02:00 UTCEPSS rescore
  56. 2026-07-15 02:00 UTCEPSS rescore
  57. 2026-07-14 22:29 UTCGHSA enrichment
  58. 2026-07-13 22:31 UTCEPSS rescore
  59. 2026-07-13 21:08 UTCGHSA enrichment
  60. 2026-07-13 06:13 UTCEPSS rescore
  61. 2026-07-13 06:13 UTCEPSS rescore
  62. 2026-07-12 19:47 UTCGHSA enrichment
  63. 2026-07-12 05:46 UTCEPSS rescore
  64. 2026-07-11 18:26 UTCGHSA enrichment
  65. 2026-07-11 08:27 UTCEPSS rescore
  66. 2026-07-11 08:27 UTCEPSS rescore
  67. 2026-07-10 17:04 UTCGHSA enrichment
  68. 2026-07-09 19:10 UTCEPSS rescore
  69. 2026-07-09 19:10 UTCEPSS rescore
  70. 2026-07-09 15:42 UTCGHSA enrichment
  71. 2026-07-08 15:16 UTCEPSS rescore
  72. 2026-07-08 15:16 UTCEPSS rescore
  73. 2026-07-08 14:14 UTCGHSA enrichment
  74. 2026-07-07 13:46 UTCEPSS rescore
  75. 2026-07-07 13:46 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56381?
CVE-2026-56381 is a medium vulnerability published on June 21, 2026. Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other…
When was CVE-2026-56381 disclosed?
CVE-2026-56381 was first published in the National Vulnerability Database on June 21, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56381 actively exploited?
CVE-2026-56381 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 83.7% of all scored CVEs.
What is the CVSS score of CVE-2026-56381?
CVE-2026-56381 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-56381?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56381, 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.

Dependency Blast Radius

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