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CVE-2011-0633

MEDIUM · CVSS 4.3EPSS 4.2%EU EUVD

The Net::HTTPS module in libwww-perl (LWP) before 6.00, as used in WWW::Mechanize, LWP::UserAgent, and other products, when running in environments that do not set the If-SSL-Cert-Subject header, does not enable full validation of SSL certificates by default, which allows remote attackers to spoof servers via man-in-the-middle (MITM) attacks involving hostnames that are not properly validated. NOTE: it could be argued that this is a design limitation of the Net::HTTPS API, and separate implementations should be independently assigned CVE identifiers for not working around this limitation. However, because this API was modified within LWP, a single CVE identifier has been assigned.

Key facts

CVSS score
4.3 (v2.0)
Severity
MEDIUM
CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness (CWE)
CWE-20
EPSS score
4.2% (91th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2011-0651)
Published
May 13, 2011
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-0651 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl
  • gisle aas / libwww-perl

and 74 more…

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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