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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | wordpress | 3.2.1+dfsg-1 | — |
| Debian 13 | wordpress | 3.2.1+dfsg-1 | — |
| Debian 12 | wordpress | 3.2.1+dfsg-1 | — |
| Debian 6.0 | wordpress | 3.3.2+dfsg-1~squeeze1 | DSA-2470-1 |
Advisories 1
- DSA-2470-1 wordpress - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20120419 Re: CVE-request: WordPress 3.1.1 mailing-list
- 44038 third-party-advisory
- http://wordpress.org/news/2011/04/wordpress-3-1-1/
- http://core.trac.wordpress.org/ticket/16892
- 49138 third-party-advisory
- [oss-security] 20120419 Re: CVE-request: WordPress 3.1.1 mailing-list
- DSA-2470 vendor-advisory