Vulnerability · Published Apr 14, 2021 · Assigned by hackerone
CVE-2021-22879
High 8.8
In plain English
A high-severity security flaw in Nextcloud Desktop Client. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 5.0% (higher than 92% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)5.0%top 7.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | nextcloud-desktop | 3.1.1-2 | DEBIAN-CVE-2021-22879 |
| Debian:13 | nextcloud-desktop | 3.1.1-2 | DEBIAN-CVE-2021-22879 |
| Debian:14 | nextcloud-desktop | 3.1.1-2 | DEBIAN-CVE-2021-22879 |
| Ubuntu:22.04:LTS | nextcloud-desktop | no fix listed | UBUNTU-CVE-2021-22879 |
| Ubuntu:24.04:LTS | nextcloud-desktop | no fix listed | UBUNTU-CVE-2021-22879 |
| Ubuntu:25.10 | nextcloud-desktop | no fix listed | UBUNTU-CVE-2021-22879 |
| Ubuntu:26.04:LTS | nextcloud-desktop | no fix listed | UBUNTU-CVE-2021-22879 |
| Ubuntu:26.10 | nextcloud-desktop | no fix listed | UBUNTU-CVE-2021-22879 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | Nextcloud Desktop Client | Fixed in 3.1.3 |
Weakness: CWE-99
References
- https://hackerone.com/reports/1078002 x_refsource_MISC
- https://nextcloud.com/security/advisory/?id=NC-SA-2021-008 x_refsource_MISC
- https://github.com/nextcloud/desktop/pull/2906 x_refsource_MISC
- FEDORA-2021-1ffffa0251 vendor-advisory, x_refsource_FEDORA
- GLSA-202105-37 vendor-advisory, x_refsource_GENTOO