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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (24.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Postorius Project — versions 0
- Postorius Project
Weakness classification (CWE)
References
- gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b (Patch)
- gitlab.com/mailman/postorius/-/merge_requests/972 (Patch, Issue Tracking)
- gitlab.com/mailman/postorius/-/issues/620 (Issue Tracking, Vendor Advisory)
- www.openwall.com/lists/oss-security/2026/05/07/3 (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.