CVE-2019-12739

CRITICALNVD 9.09.0—

9.0

lib/Controller/ExtractionController.php in the Extract add-on before 1.2.0 for Nextcloud allows Remote Code Execution via shell metacharacters in a RAR filename via ajax/extractRar.php (nameOfFile and directory parameters).

CVSS v3: 9.0
EG Score: 9.0(medium)
EPSS: 80.8%
KEV: Not listed

Published

June 5, 2019

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://hackerone.com/reports/546753
cve@mitrehttps://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/546753
af854a3a-2127-422b-91ae-364da2661108https://www.secsignal.org/news/a-tale-of-rce-nextcloud-extract-app/

Weakness Classification(1)

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

CWE-78OS Command Injection

Data Freshness Timeline

(refreshed 10× in last 7d / 19× 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.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 18:50 UTCEG score recompute
2026-05-27 18:50 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
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 00:53 UTCOSV refresh

Frequently asked(5)

What is CVE-2019-12739?

CVE-2019-12739 is a critical vulnerability published on June 5, 2019. lib/Controller/ExtractionController.php in the Extract add-on before 1.2.0 for Nextcloud allows Remote Code Execution via shell metacharacters in a RAR filename via ajax/extractRar.php (nameOfFile and directory parameters).

When was CVE-2019-12739 disclosed?

CVE-2019-12739 was first published in the National Vulnerability Database on June 5, 2019, 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-2019-12739 actively exploited?

CVE-2019-12739 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 80.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-12739?

CVE-2019-12739 has a CVSS v3 base score of 9.0 (NVD).

How do I remediate CVE-2019-12739?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-12739, 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

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CVE-2019-12739

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-12739?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)