The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check URLs before passing them to…

Description

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.

Scores

EPSS (exploitation in 30 days)

3.2% · top 12% of all CVEs (3 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• n/a
• CWE-20 (opens in a new tab)All about CWE-20 and its CVEs

Affected products

• n/a

  • affected n/a

References (7)

• [oss-security] 20120419 Re: CVE-request: WordPress 3.1.1 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• 44038 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• http://wordpress.org/news/2011/04/wordpress-3-1-1/ (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://core.trac.wordpress.org/ticket/16892 (opens in a new tab)x_refsource_CONFIRMx_transferred
• 49138 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• [oss-security] 20120419 Re: CVE-request: WordPress 3.1.1 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• DSA-2470 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2011-4957](https://trackcve.app/badge/CVE-2011-4957.svg)](https://trackcve.app/cve/CVE-2011-4957)

Record last updated 17 Sept 2024, 03:44 UTC.