CVE-2018-3775

HIGHNVD 8.88.8—

8.8

Improper Authentication in Nextcloud Server prior to version 12.0.3 would allow an attacker that obtained user credentials to bypass the 2 Factor Authentication.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 42.5%
KEV: Not listed

Published

August 12, 2018

Last Modified

November 21, 2024

References (4)

support@hackeronehttps://hackerone.com/reports/248656
support@hackeronehttps://nextcloud.com/security/advisory/?id=NC-SA-2018-007
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/248656
af854a3a-2127-422b-91ae-364da2661108https://nextcloud.com/security/advisory/?id=NC-SA-2018-007

Weakness Classification(1)

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

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 11× in last 7d / 20× 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.

2026-06-05 06:08 UTCepss_batch
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2026-05-29 13:41 UTCepss_batch
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2026-05-28 04:09 UTCEG score recompute
2026-05-28 04:09 UTCGHSA enrichment
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2026-05-26 13:42 UTCepss_batch
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2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-3775?

CVE-2018-3775 is a high vulnerability published on August 12, 2018. Improper Authentication in Nextcloud Server prior to version 12.0.3 would allow an attacker that obtained user credentials to bypass the 2 Factor Authentication.

When was CVE-2018-3775 disclosed?

CVE-2018-3775 was first published in the National Vulnerability Database on August 12, 2018, 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-2018-3775 actively exploited?

CVE-2018-3775 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-3775?

CVE-2018-3775 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2018-3775?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-3775, 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-2018-3775

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-3775?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)