Is CVE-2021-3688 in the CISA KEV catalog?

No. CVE-2021-3688 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3688?

CVE-2021-3688 has a CVSS v3 base score of 4.8 (MEDIUM).

What is the EPSS score for CVE-2021-3688?

CVE-2021-3688 has an EPSS score of 0.47% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3688?

Upgrade jboss core services httpd to 2.4.37 or later.

CVE & CISA-KEV Catalog

CVE-2021-3688

MEDIUM

4.8

CVSS v3

NVD

Description

A flaw was found in Red Hat JBoss Core Services HTTP Server in all versions, where it does not properly normalize the path component of a request URL contains dot-dot-semicolon(s). This flaw could allow an attacker to access unauthorized information or possibly conduct further attacks. The highest threat from this vulnerability is to data confidentiality and integrity.

CWE-200Information Exposure CWE-22Path Traversal

How to fix

Remediation Available

jboss core services httpdNVD

Affected:< 2.4.37Fixed in:2.4.37CVE-2021-3688derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploit Intelligence

0.47%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.