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CVE-2011-0633· NVD / CVE Program· CNA mitre

The Net::HTTPS module in libwww-perl (LWP) before 6.00, as used in WWW::Mechanize, LWP::UserAgent, and other products, when running in envir

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.

MediumCVSS 4.3 · v2.0—No exploit Fix available
Published
May 13, 2011
Updated
Jun 16, 2026
EPSS
4.2% · 91th percentile
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Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.2%

Affected systems

VendorProduct
gisle aaslibwww-perl
search.cpanlibwww-perl

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gisle aas libwww-perl0.01
  • gisle aas libwww-perl0.02
  • gisle aas libwww-perl0.03
  • gisle aas libwww-perl0.04
  • gisle aas libwww-perl5.00
  • gisle aas libwww-perl5.01
  • gisle aas libwww-perl5.02
  • gisle aas libwww-perl5.03
  • gisle aas libwww-perl5.04
  • gisle aas libwww-perl5.05
  • gisle aas libwww-perl5.06
  • gisle aas libwww-perl5.07
  • gisle aas libwww-perl5.08
  • gisle aas libwww-perl5.09
  • gisle aas libwww-perl5.10
  • gisle aas libwww-perl5.11
  • gisle aas libwww-perl5.12
  • gisle aas libwww-perl5.13
  • gisle aas libwww-perl5.14
  • gisle aas libwww-perl5.15

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libwww-perlbefore 6.01-16.01-1

Same product

gisle aas: all records

Other highest-scoring records for the same primary product.

  • CVE-2010-2253lwp-download in libwww-perl before 5.835 does not reject downloads to filenames that begin with a .
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:libwww-perl6.01-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    none
    Integrity
    P · data or configuration can be modified
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    None
    Integrity impact
    P
    Availability impact
    None

    Weakness class (CWE)

    CWE-20 · Improper Input Validation

    CVSS vector

    AV:N/AC:M/Au:N/C:N/I:P/A:N

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    Noroxi analysis

    No Noroxi analysis for this record yet

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    Change log

    1. Fix✗ → ✓

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    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records