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Vulnerability details: VCID-gu44-7hkr-muae
Vulnerability ID VCID-gu44-7hkr-muae
Aliases CVE-2011-4317
Summary An additional exposure was found when using mod_proxy in reverse proxy mode. In certain configurations using RewriteRule with proxy flag or ProxyPassMatch, a remote attacker could cause the reverse proxy to connect to an arbitrary server, possibly disclosing sensitive information from internal web servers not directly accessible to attacker.
Status Published
Exploitability 2.0
Weighted Severity 4.8
Risk 9.6
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
epss 0.81918 https://api.first.org/data/v1/epss?cve=CVE-2011-4317
epss 0.81918 https://api.first.org/data/v1/epss?cve=CVE-2011-4317
epss 0.81918 https://api.first.org/data/v1/epss?cve=CVE-2011-4317
epss 0.81918 https://api.first.org/data/v1/epss?cve=CVE-2011-4317
epss 0.81918 https://api.first.org/data/v1/epss?cve=CVE-2011-4317
epss 0.81918 https://api.first.org/data/v1/epss?cve=CVE-2011-4317
apache_httpd moderate https://httpd.apache.org/security/json/CVE-2011-4317.json
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2011-4317.json
https://api.first.org/data/v1/epss?cve=CVE-2011-4317
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4317
756483 https://bugzilla.redhat.com/show_bug.cgi?id=756483
CVE-2011-4317 https://httpd.apache.org/security/json/CVE-2011-4317.json
CVE-2011-4317;OSVDB-77310 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/36352.txt
CVE-2011-4317;OSVDB-77310 Exploit https://www.securityfocus.com/bid/50802/info
GLSA-201206-25 https://security.gentoo.org/glsa/201206-25
RHSA-2012:0128 https://access.redhat.com/errata/RHSA-2012:0128
USN-1368-1 https://usn.ubuntu.com/1368-1/
Data source Exploit-DB
Date added Nov. 24, 2011
Description Apache 7.0.x mod_proxy - Reverse Proxy Security Bypass
Ransomware campaign use Known
Source publication date Nov. 24, 2011
Exploit type remote
Platform linux
Source update date Jan. 31, 2017
Source URL https://www.securityfocus.com/bid/50802/info
Exploit Prediction Scoring System (EPSS)
Percentile 0.99193
EPSS Score 0.81918
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:36:17.898172+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2011-4317.json 38.0.0