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Vulnerability details: VCID-z7xa-vrkn-t3bj
Vulnerability ID VCID-z7xa-vrkn-t3bj
Aliases CVE-2011-3368
Summary An 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. No update of 1.3 will be released. Patches will be published to https://archive.apache.org/dist/httpd/patches/apply_to_1.3.42/
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 0.78908 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.78908 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.78908 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.78908 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.78908 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.78908 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.78908 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.79963 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
epss 0.79963 https://api.first.org/data/v1/epss?cve=CVE-2011-3368
apache_httpd moderate https://httpd.apache.org/security/json/CVE-2011-3368.json
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2011-3368.json
https://api.first.org/data/v1/epss?cve=CVE-2011-3368
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-3368
740045 https://bugzilla.redhat.com/show_bug.cgi?id=740045
CVE-2011-3368 https://httpd.apache.org/security/json/CVE-2011-3368.json
CVE-2011-3368;OSVDB-76079 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/remote/17969.py
RHSA-2011:1391 https://access.redhat.com/errata/RHSA-2011:1391
RHSA-2011:1392 https://access.redhat.com/errata/RHSA-2011:1392
RHSA-2012:0542 https://access.redhat.com/errata/RHSA-2012:0542
RHSA-2012:0543 https://access.redhat.com/errata/RHSA-2012:0543
USN-1259-1 https://usn.ubuntu.com/1259-1/
Data source Exploit-DB
Date added Oct. 11, 2011
Description Apache mod_proxy - Reverse Proxy Exposure
Ransomware campaign use Known
Source publication date Oct. 11, 2011
Exploit type remote
Platform multiple
Source update date Jan. 31, 2017
Data source Metasploit
Description Scan for poorly configured reverse proxy servers. By default, this module attempts to force the server to make a request with an invalid domain name. Then, if the bypass is successful, the server will look it up and of course fail, then responding with a status code 502. A baseline status code is always established and if that baseline matches your test status code, the injection attempt does not occur. "set VERBOSE true" if you are paranoid and want to catch potential false negatives. Works best against Apache and mod_rewrite
Note 
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Ransomware campaign use Unknown
Source URL https://github.com/rapid7/metasploit-framework/tree/master/modules/auxiliary/scanner/http/rewrite_proxy_bypass.rb
Exploit Prediction Scoring System (EPSS)
Percentile 0.99002
EPSS Score 0.78908
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:28:54.369205+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2011-3368.json 37.0.0