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)...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-41055- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-41055- Updated
- 2026-11-02
EUVDEUVD-2021-28206 No score
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.
- Record
EUVD-2021-28206- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r23x-224g-484r No score
Gajim 1.2.x and 1.3.x before 1.3.3 allows remote attackers to cause a denial of service (crash)...
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.
- Record
GHSA-r23x-224g-484r- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-41055- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2021-41055- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-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.
- Record
UBUNTU-CVE-2021-41055- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2022-0179 No score
Updated python-nbxmpp packages fix security vulnerability
Missing input sanitising in python-nbxmpp, a Jabber/XMPP Python library, could result in denial of service in clients based on it (such as Gajim).
- Record
MGASA-2022-0179- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:11734-1 No score
gajim-1.3.3-1.1 on GA media
These are all security issues fixed in the gajim-1.3.3-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:11734-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
python-nbxmppDebian:12 |
before 2.0.4-1 | 2.0.4-1 |
python-nbxmppDebian:13 |
before 2.0.4-1 | 2.0.4-1 |
python-nbxmppDebian:14 |
before 2.0.4-1 | 2.0.4-1 |
python-nbxmppDebian:11 |
before 2.0.2-1+deb11u1, plus listed versions 2.0.2-1 |
2.0.2-1+deb11u1 |
python-nbxmppMageia:8 |
before 2.0.4-1.mga8 | 2.0.4-1.mga8 |
python-nbxmppUbuntu:16.04:LTS |
All versions, plus listed versions 0.5.1-20.5.3-1 |
None known |
gajimopenSUSE:Tumbleweed |
before 1.3.3-1.1 | 1.3.3-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-41055 is a high vulnerability (CVSS 7.5) in Gajim, published October 11, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.57%, the 75th percentile. Fixed in python-nbxmpp 2.0.4-1.