CVE-2026-55790 (GCVE-0-2026-55790)

Vulnerability from cvelistv5 – Published: 2026-07-01 22:57 – Updated: 2026-07-02 19:41
VLAI
Title
Craft CMS: DOM XSS via GitHub issue title in CraftSupport widget
Summary
Craft CMS is a content management system (CMS). In versions 5.0.0-RC1 through 5.9.22 and 4.0.0-RC1 through 4.17.15, an attacker with only a GitHub account can plant a JavaScript payload in a craftcms/cms issue title. When a Craft admin uses the CraftSupport widget’s "Give feedback" screen and types a search term that returns the poisoned issue, the payload executes in the admin’s control panel session. No control panel account or elevated privileges are required on the attacker’s side. This issue has been fixed in versions 4.17.16 and 5.9.23.
Severity
7.4 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 19:35 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7886 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
craftcms cms Affected: >= 5.0.0-RC1, < 5.9.23
Affected: >= 4.0.0-RC1, < 4.17.16
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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