CVE-2018-20298

MEDIUMNVD 6.56.5—Trending — 3 sources updated this week

6.5

S3 Browser before 8.1.5 contains an XML external entity (XXE) vulnerability, allowing remote attackers to read arbitrary files and obtain NTLMv2 hash values by tricking a user into connecting to a malicious server via the S3 protocol.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 65.5%
KEV: Not listed

Published

December 19, 2018

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://s3browser.com/news.aspx
cve@mitrehttps://www.ptsecurity.com/ww-en/analytics/threatscape/pt-2018-34/
af854a3a-2127-422b-91ae-364da2661108https://s3browser.com/news.aspx
af854a3a-2127-422b-91ae-364da2661108https://www.ptsecurity.com/ww-en/analytics/threatscape/pt-2018-34/

Weakness Classification(1)

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

CWE-611Improper Restriction of XML External Entity Reference (XXE)

Data Freshness Timeline

(refreshed 12× in last 7d / 18× 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.

2026-06-02 20:11 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 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 00:11 UTCEG score recompute
2026-05-28 00:10 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
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

Frequently asked(5)

What is CVE-2018-20298?

CVE-2018-20298 is a medium vulnerability published on December 19, 2018. S3 Browser before 8.1.5 contains an XML external entity (XXE) vulnerability, allowing remote attackers to read arbitrary files and obtain NTLMv2 hash values by tricking a user into connecting to a malicious server via the S3 protocol.

When was CVE-2018-20298 disclosed?

CVE-2018-20298 was first published in the National Vulnerability Database on December 19, 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-2018-20298 actively exploited?

CVE-2018-20298 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-20298?

CVE-2018-20298 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2018-20298?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20298, 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.

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CVE-2018-20298

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-20298?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)