How severe is CVE-2018-20298?

CVE-2018-20298 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-20298 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20298?

CVE-2018-20298 affects S3browser S3 Browser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20298?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-20298 published?

CVE-2018-20298 was published on 2018-12-19 and last updated on 2026-06-17.

CVE-2018-20298

CVE-2018-20298 is a medium-severity vulnerability in S3browser S3 Browser with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-611.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: S3browser S3 Browser
Published: 2018-12-19
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2018-20298?: 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.
How severe is CVE-2018-20298?: CVE-2018-20298 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-20298 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20298?: CVE-2018-20298 affects S3browser S3 Browser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20298?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20298 published?: CVE-2018-20298 was published on 2018-12-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:s3browser:s3_browser:*:*:*:*:*:*:*:*

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