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CVE-2018-20298

22
FAUCET Score

CVE-2018-20298 describes an XML External Entity (XXE) vulnerability in S3 Browser versions prior to 8.1.5. This flaw allows remote attackers to read arbitrary files and capture NTLMv2 hashes if a user is tricked into connecting to a malicious S3 server. Rated 6.5 (Medium) on the CVSS scale, the vulnerability requires user interaction and has high confidentiality impact, but no integrity or availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.1.5CPE matchmatch criteria
cpe:2.3:a:s3browser:s3_browser:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.40%
Probability of exploitation in next 30 days
EPSS Percentile
69.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0140 is in the 82nd percentile among its peer group of 26,209 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

s3browser.com / news.aspx
Release NotesVendor Advisory
ptsecurity.com / ww-en/analytics/threatscape/pt-2018-34
Third Party Advisory