Postorius Project: >> Postorius >> 1.2 Security Vulnerabilities
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.
CVSS Score
7.2
EPSS Score
0.002
Published
2026-05-07
An issue was discovered in views/list.py in GNU Mailman Postorius before 1.3.5. An attacker (logged into any account) can send a crafted POST request to unsubscribe any user from a mailing list, also revealing whether that address was subscribed in the first place.
CVSS Score
5.4
EPSS Score
0.011
Published
2021-09-10