Home
HIGH: 7.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:NDefault status
unknown
Any version
affected
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.
Problem types
CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Product status
Any version
References
gitlab.com/...ommit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b
gitlab.com/mailman/postorius/-/merge_requests/972
gitlab.com/mailman/postorius/-/issues/620
www.openwall.com/lists/oss-security/2026/05/07/3