CVE-2021-3688: redhat jboss_core_services_httpd
Vulnerability summary
CVE-2021-3688 is a medium (CVSS 4.8) vulnerability in redhat jboss_core_services_httpd. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 26-08-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
0.57%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
+0.01 pp
From 0.56% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-200Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
- CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
Affected systems
Redhat1 product
- jboss_core_services_httpd< 2.4.37 | 2.4.37 | 2.4.37:sp1 | 2.4.37:sp2 | 2.4.37:sp3 | 2.4.37:sp4 | 2.4.37:sp5 | 2.4.37:sp6 | 2.4.37:sp7 | 2.4.37:sp8 | 2.4.37:sp9
1 vendor · 1 product