UpHeron
All vulnerabilities

WordPress core

CVE-2011-4957

The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to the PCRE library, which allows remote attackers to cause a denial of service (crash) via a comment with a crafted URL that triggers many recursive calls.

Severity
Medium 5.0
Published
27 Jun 2012
Last changed
16 Jun 2026
Added to UpHeron
17 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
WordPressWordPress core · cpe:a:wordpress:wordpress
  • Version 3.0.6
  • Version 3.0.5
  • Version 3.0.4
  • Version 3.0.3
All 75 release lines
  • Every version up to 3.1
  • Version 0.71
  • Version 1.0
  • Version 1.0.1
  • Version 1.0.2
  • Version 1.1.1
  • Version 1.2
  • Version 1.2.1
  • Version 1.2.2
  • Version 1.2.3
  • Version 1.2.4
  • Version 1.2.5-a
  • Version 1.2.5
  • Version 1.3
  • Version 1.3.2
  • Version 1.3.3
  • Version 1.5
  • Version 1.5.1
  • Version 1.5.1.1
  • Version 1.5.1.2
  • Version 1.5.1.3
  • Version 1.5.2
  • Version 2.0
  • Version 2.0.1
  • Version 2.0.2
  • Version 2.0.4
  • Version 2.0.5
  • Version 2.0.6
  • Version 2.0.7
  • Version 2.0.8
  • Version 2.0.9
  • Version 2.0.10
  • Version 2.0.11
  • Version 2.1
  • Version 2.1.1
  • Version 2.1.2
  • Version 2.1.3
  • Version 2.2
  • Version 2.2.1
  • Version 2.2.2
  • Version 2.2.3
  • Version 2.3
  • Version 2.3.1
  • Version 2.3.2
  • Version 2.3.3
  • Version 2.5
  • Version 2.5.1
  • Version 2.6
  • Version 2.6.1
  • Version 2.6.2
  • Version 2.6.3
  • Version 2.6.5
  • Version 2.7
  • Version 2.7.1
  • Version 2.8
  • Version 2.8.1
  • Version 2.8.2
  • Version 2.8.3
  • Version 2.8.4-a
  • Version 2.8.4
  • Version 2.8.5
  • Version 2.8.5.1
  • Version 2.8.5.2
  • Version 2.8.6
  • Version 2.9
  • Version 2.9.1
  • Version 2.9.1.1
  • Version 2.9.2
  • Version 3.0
  • Version 3.0.1
  • Version 3.0.2
  • Version 3.0.3
  • Version 3.0.4
  • Version 3.0.5
  • Version 3.0.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-4957
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-4957