CVE-2026-55742

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-18. a secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.6Exploit: None knownExposed: 0

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

Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration rights handler. In system/admin/admin.rights.php, the rights update action ('a=update') modifies group access rights (including via cot_auth_add_group) without calling cot_check_xg() to validate the anti-CSRF token. A remote attacker who lures an authenticated administrator into visiting a malicious page can force the browser to submit a forged request that grants elevated permissions to an attacker-controlled group, escalating privileges to administrator. Because Cotonti administrators can modify templates and configuration, this can be further leveraged toward remote code execution.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity96% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

June 18, 2026

Last Modified

June 22, 2026

Advisory Details (2)

Auto-updated Jul 31, 2026
No patch confirmed yet.
generic

Cotonti/system/admin/admin.rights.php at f43f1fc38ba4e02027786dad9dac1435c7c52b30 · Cotonti/Cotonti · GitHub

https://github.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/system/admin/admin.rights.php#L53
generic

GitHub - Cotonti/Cotonti: Fast, reliable and flexible PHP CMF/CMS · GitHub

https://github.com/Cotonti/Cotonti

Vendor Advisories for CVE-2026-55742(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composercotonti/cotonti—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
cotonti/cotonti0.9.23 ... 1.0.0 (6 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 40× in last 7d / 158× 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 270 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-55742?
CVE-2026-55742 is a critical vulnerability published on June 18, 2026. Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration rights handler. In system/admin/admin.rights.php, the rights update action ('a=update') modifies group access rights (including via cotauthaddgroup) without calling cotcheck_xg() to…
When was CVE-2026-55742 disclosed?
CVE-2026-55742 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55742 actively exploited?
CVE-2026-55742 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 86.5% of all scored CVEs.
What is the CVSS score of CVE-2026-55742?
CVE-2026-55742 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-55742?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55742, 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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