CVE-2011-4957: n/a vulnerability

CVE-2011-4957: The make_clickable function in wp-includes/formatting.php in WordPress before 3.1.1 does not properly check...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 17, 2024, 03:44 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2011-4957 is an old WordPress denial-of-service issue. WordPress before 3.1.1 could crash when processing a specially crafted URL in a comment. The sources do not show data theft, code execution, or confirmed active exploitation. Exposure is most likely on legacy WordPress installations older than 3.1.1, especially where comment content is accepted and rendered. Modern WordPress deployments should not be exposed if they are updated beyond that fixed version. Treat this as legacy hygiene unless an affected WordPress site is still internet-facing. The business risk is availability disruption, not confirmed compromise. Prioritize upgrades for any old public WordPress instance because the affected versions are long unsupported. Mitigation focus: Upgrade WordPress to 3.1.1 or later.; Review WordPress 3.1.1 release guidance for the fixed version boundary.; If using Debian packages, review DSA-2470 for distribution-specific guidance..

Prepared: Jun 24, 2026, 12:34 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 27, 2012, 21:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

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1Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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