CVE-2011-2766
HIGH · CVSS 7.5EPSS 7.2%EU EUVD
The FCGI (aka Fast CGI) module 0.70 through 0.73 for Perl, as used by CGI::Fast, uses environment variable values from one request during processing of a later request, which allows remote attackers to bypass authentication via crafted HTTP headers.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-287
- EPSS score
- 7.2% (94th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-2740)
- Published
- September 23, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-2740 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- debian / debian linux
- debian / debian linux
- debian / debian linux
- fast cgi project / fast cgi
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=607479(Exploit, Issue Tracking, Mailing List, Third Party Advisory)
- http://www.debian.org/security/2011/dsa-2327(Third Party Advisory)
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:001(Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2011/09/08/1(Mailing List, Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2011/09/08/2(Mailing List, Third Party Advisory)
- http://www.securityfocus.com/bid/49549(Third Party Advisory, VDB Entry)
- https://bugzilla.redhat.com/show_bug.cgi?id=736604(Exploit, Issue Tracking, Third Party Advisory)
- https://exchange.xforce.ibmcloud.com/vulnerabilities/69709(Third Party Advisory, VDB Entry)
- https://hermes.opensuse.org/messages/13154637(Broken Link)
- https://hermes.opensuse.org/messages/13155253(Broken Link)
- https://rt.cpan.org/Public/Bug/Display.html?id=68380(Exploit, Patch, Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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