How severe is CVE-2011-3368?

No CVSS score has been assigned to CVE-2011-3368 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2011-3368?

Affected package information for CVE-2011-3368 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2011-3368?

No fixed version has been published for CVE-2011-3368 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2011-3368 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2011-3368, including 1 documented proof-of-concept exploit on Exploit-DB and 3 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2011-3368?

CVE-2011-3368 has an EPSS (Exploit Prediction Scoring System) score of 90.7%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

What type of vulnerability is CVE-2011-3368?

CVE-2011-3368 is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2011-3368 published, and has it been updated?

CVE-2011-3368 was published on October 5, 2011 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2011-3368: vulnerability details, affected versions & fix

EPSS Exploitation Probability

via FIRST.org ↗

90.7%probability of exploitation in next 30 days

Very High Risk100th percentile+13.84%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21 does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers via a malformed URI containing an initial @ (at sign) character.

Frequently Asked Questions

The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21 does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers via a malformed URI containing an initial @ (at sign) character.

O3 Security · Impact-Aware SCA

Is CVE-2011-3368 in your stack?

O3 detects CVE-2011-3368 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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