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No exploitation reportedFix available

CVE-2021-41055

No exploitation reported by the sources we read.

  • Published2021-10-11
  • Fixed in1.3.3

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Gajim 1.2.x and 1.3.x before 1.3.3 allows remote attackers to cause a denial of service (crash) via a crafted XMPP Last Message Correction (XEP-0308) message in multi-user chat, where the message ID equals the correction ID.

Timeline

dates in UTC
  1. 2021-10-1103:15CVE publishedNVD

Versions per branch

NVD
Gajim
BranchAffectedFixed in
1.x≥ 1.2.0, < 1.3.31.3.3

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • gajimopenSUSE:Tumbleweedall versions · fixed in 1.3.3-1.1
  • python-nbxmppUbuntu:16.04:LTSall versions · no fixed version listed
  • python-nbxmppMageia:8all versions · fixed in 2.0.4-1.mga8
  • python-nbxmppDebian:14all versions · fixed in 2.0.4-1
  • python-nbxmppDebian:13all versions · fixed in 2.0.4-1
  • python-nbxmppDebian:12all versions · fixed in 2.0.4-1
  • python-nbxmppDebian:11all versions · fixed in 2.0.2-1+deb11u1

Vendor advisories

Full record on NVD

Fix

  1. Update Gajim to 1.3.3

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-10-11
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-r23x-224g-484r

Frequently asked questions

What is CVE-2021-41055?

Gajim 1.2.x and 1.3.x before 1.3.3 allows remote attackers to cause a denial of service (crash) via a crafted XMPP Last Message Correction (XEP-0308) message in multi-user chat, where the message ID equals the correction ID.

Is CVE-2021-41055 actively exploited?

Active exploitation of CVE-2021-41055 has not been confirmed. Its EPSS score was 1.6% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-41055?

CVE-2021-41055 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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