CVE-2011-4957 json
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…
published 2012-06-27 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4864
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.2%
- EPSS 3.2% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- wordpress Debian 14, Debian 13, Debian 12 3.2.1+dfsg-1
debian advisories DEBIAN-CVE-2011-4957
Exploit prediction
3.23% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
- Technology feeds
References
-
debian.org
/security/2012/dsa-2470
vendor-advisory
-
secunia.com
/advisories/44038
third-party-advisory, vendor-advisory
-
secunia.com
/advisories/49138
third-party-advisory, vendor-advisory
-
openwall.com
/lists/oss-security/2012/04/19/17
mailing-list
- wordpress.org /news/2011/04/wordpress-3-1-1/
- core.trac.wordpress.org /ticket/16892
-
openwall.com
/lists/oss-security/2012/04/19/6
mailing-list
Sources
- CVE List CVE-2011-4957
- NVD CVE-2011-4957
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.