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Vulnerability · Published Sep 10, 2021 · Assigned by mitre

CVE-2021-40347

Medium 5.4

In plain English

A medium-severity security flaw in the postorius package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.4Medium
Exploit odds (30 days)1.2%top 32.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12postorius1.3.5-1DEBIAN-CVE-2021-40347
Debian:13postorius1.3.5-1DEBIAN-CVE-2021-40347
Debian:14postorius1.3.5-1DEBIAN-CVE-2021-40347
PyPIpostorius1.3.5GHSA-v83x-78q3-gr2j
PyPIpostorius1.3.5PYSEC-2021-319
Ubuntu:22.04:LTSpostorius1.3.5-1UBUNTU-CVE-2021-40347

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References