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CVE-2021-22879

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing...

8.8 HighFix available

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

5.04%Up 4.2 points since Apr 15, 2021
90%50%10%1%

What each source reports

NVD Score used 8.8

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
CVE-2021-22879
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0
6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness
CWE-99, CWE-74
Updated
2026-11-02
CVE List No score

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
CVE-2021-22879
Weakness
CWE-99
Updated
2026-11-02
EUVDEUVD-2021-10014 No score

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
EUVD-2021-10014
Updated
2026-11-03
GitHub AdvisoriesGHSA-vrvw-x9cv-3j76 8.8

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing...

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
GHSA-vrvw-x9cv-3j76
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-74
Updated
2026-11-02
OSV 8.8

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
CVE-2021-22879
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2021-22879 8.8

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
DEBIAN-CVE-2021-22879
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-22879 8.8

Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
UBUNTU-CVE-2021-22879
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2021:0577-1 No score

Security update for nextcloud-desktop

This update for nextcloud-desktop fixes the following issues:

nextcloud-desktop was updated to 3.1.3:

  • desktop#2884 [stable-3.1] Add support for Hirsute
  • desktop#2920 [stable-3.1] Validate sensitive URLs to onle allow http(s) schemes.
  • desktop#2926 [stable-3.1] Validate the providers ssl certificate
  • desktop#2939 Bump release to 3.1.3

This also fix security issues:

  • (boo#1184770, CVE-2021-22879, NC-SA-2021-008 , CWE-99)

    Nextcloud Desktop Client prior to 3.1.3 is vulnerable to resource injection by way of missing validation of URLs, allowing a malicious server to execute remote commands. User interaction is needed for exploitation.

Record
openSUSE-SU-2021:0577-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:11088-1 No score

caja-extension-nextcloud-3.3.4-1.1 on GA media

These are all security issues fixed in the caja-extension-nextcloud-3.3.4-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11088-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
nextcloud-desktop
Debian:12
 before 3.1.1-2
3.1.1-2
nextcloud-desktop
Debian:13
 before 3.1.1-2
3.1.1-2
nextcloud-desktop
Debian:14
 before 3.1.1-2
3.1.1-2
nextcloud-desktop
Ubuntu:20.04:LTS
 All versions, plus listed versions
2.5.3-12.6.0-12.6.1-12.6.1-22.6.2-12.6.2-1build1
 None known
nextcloud-desktop
Ubuntu:22.04:LTS
 All versions, plus listed versions
3.2.3-0ubuntu13.3.5-13.3.5-1ubuntu13.4.2-13.4.2-1ubuntu1
 None known
nextcloud-desktop
Ubuntu:24.04:LTS
 All versions, plus listed versions
3.9.0-13.10.0-13.11.0-13.11.0-1.1build33.11.0-1.1build4
 None known
nextcloud-desktop
Ubuntu:25.10
 All versions, plus listed versions
3.16.0-13.16.2-13.16.4-13.16.6-13.16.6-3
 None known
nextcloud-desktop
Ubuntu:26.10
 All versions, plus listed versions
4.0.6-133.0.2-133.0.7-1ubuntu1
 None known
nextcloud-desktop
Ubuntu:26.04:LTS
 All versions, plus listed versions
3.16.6-33.16.7-14.0.1-24.0.1-2build14.0.6-1
 None known
nextcloud-desktop
openSUSE:Leap 15.2
 before 3.1.3-lp152.2.6.1
3.1.3-lp152.2.6.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-22879 is a high vulnerability (CVSS 8.8) in Nextcloud Desktop, published April 14, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.04%, the 92nd percentile. Fixed in nextcloud-desktop 3.1.1-2.

References

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