GitHub Advisoryadvisory · PyPI
GHSA-r7c9-7pjq-hmm8 Postorius is vulnerable to XSS
HIGH
Official page ↗
- Aliases
- CVE-2026-44742
- Ecosystem
- PyPI
- Packages
- postorius
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
- Reviewed
- 2026-05-12
Affected packages
• PyPI postorius: <= 1.3.13 (no fix yet)
Description
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.
Related
Alias · CVE (1)
- 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… vulnerability
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-44742 advisory
- https://gitlab.com/mailman/postorius package
- https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b web
- https://gitlab.com/mailman/postorius/-/issues/620 web
- https://gitlab.com/mailman/postorius/-/merge_requests/972 web
- https://www.openwall.com/lists/oss-security/2026/05/07/3 web