XSS in Postorius Project
CVE-2026-44742
Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.000 (1.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Postorius Project — versions 0
- Postorius_project Postorius
Weakness classification (CWE)
References
- cve@mitre.org (Patch)
- cve@mitre.org (Patch, Issue Tracking)
- cve@mitre.org (Issue Tracking, Vendor Advisory)
- cve@mitre.org (Patch, Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-44742?
- CVE-2026-44742 is a high-severity vulnerability in Postorius Project, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-05-07.
- How severe is CVE-2026-44742?
- High severity. CVSS v3 base score is 7.2 out of 10.