5.4

CVE-2024-34083: aio-libs aiosmtpd

CVSS: 5.4v3.1MediumDeferred
AliasesGHSA-wgjv-9j3q-jhg8PYSEC-2026-1111UBUNTU-CVE-2024-34083
Published 18-05-2024Last modified 02-08-2024
Open JSON

Vulnerability summary

CVE-2024-34083 is a medium (CVSS 5.4) vulnerability in aio-libs aiosmtpd. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.7% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.23%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2024:0243-1OPENSUSE-SU-2026:11675-1

Timeline

  1. 18-05-2024
    PublishedVulnerability first disclosed.
  2. 02-08-2024
    Last modifiedVulnerability information updated.

Description

aiosmptd is a reimplementation of the Python stdlib smtpd.py based on asyncio. Prior to version 1.4.6, servers based on aiosmtpd accept extra unencrypted commands after STARTTLS, treating them as if they came from inside the encrypted connection. This could be exploited by a man-in-the-middle attack. Version 1.4.6 contains a patch for the issue.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

0.00 pp

From 0.23% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Aio-libs1 product
Debian1 product
  • python-aiosmtpd< 1.4.3-1.1+deb12u1 | < 1.4.6-1
PyPI1 product
  • aiosmtpd< 1.4.6
Ubuntu1 product
  • python-aiosmtpdAll versions (No fix recorded)

4 vendors · 4 products

References

10 links