CVE-2021-22879

HIGHNVD 8.88.8—Trending — 3 sources updated this week

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.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 84.7%
KEV: Not listed

Published

April 14, 2021

Last Modified

November 21, 2024

References (10)

support@hackeronehttps://github.com/nextcloud/desktop/pull/2906
support@hackeronehttps://hackerone.com/reports/1078002
support@hackeronehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTWBJAS5DJJIK7LLVBZZQTSJASUVIRVE/
support@hackeronehttps://nextcloud.com/security/advisory/?id=NC-SA-2021-008
support@hackeronehttps://security.gentoo.org/glsa/202105-37
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/desktop/pull/2906
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1078002
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MTWBJAS5DJJIK7LLVBZZQTSJASUVIRVE/
af854a3a-2127-422b-91ae-364da2661108https://nextcloud.com/security/advisory/?id=NC-SA-2021-008
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202105-37

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 14× in last 7d / 15× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 18:19 UTCEG score recompute
2026-05-26 18:19 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-22879?

CVE-2021-22879 is a high vulnerability published on April 14, 2021. 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.

When was CVE-2021-22879 disclosed?

CVE-2021-22879 was first published in the National Vulnerability Database on April 14, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-22879 actively exploited?

CVE-2021-22879 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-22879?

CVE-2021-22879 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-22879?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22879, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-22879

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CVE-2021-22879

📅 Published

🔄 Last Modified

🔗 References (10)