CVE-2026-42556 - Vulnerability Analysis
HighCVSS: 8.9Last Updated: May 8, 2026
Postiz - Stored XSS
Published: May 8, 2026Updated: May 8, 2026Remote Exploitable
Overview
Postiz 2.21.6 < 2.21.7 contains a stored XSS caused by improper sanitization of post content rendered with dangerouslySetInnerHTML, letting authenticated users execute arbitrary scripts via public preview links.
Severity & Score
Severity: High
CVSS Score: 8.9
Impact
Authenticated users can execute arbitrary scripts in other users' browsers, leading to session hijacking or data theft.
Mitigation
Update to version 2.21.7 or later.
References
Related Resources
Details
- CVE ID
- CVE-2026-42556
- Severity
- High
- CVSS Score
- 8.9
- Type
- stored_xss
- Status
- new
CWE
- CWE-79
CVSS Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L