Improper input validation in WordPress
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.032 (87.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000
Affected products
- WordPress — versions 0.71, 1.0, 1.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2012/04/19/17 (mailing-list)
- secunia.com/advisories/44038 (Vendor Advisory, third-party-advisory)
- wordpress.org/news/2011/04/wordpress-3-1-1/
- core.trac.wordpress.org/ticket/16892
- secunia.com/advisories/49138 (Vendor Advisory, third-party-advisory)
- www.openwall.com/lists/oss-security/2012/04/19/6 (mailing-list)
- www.debian.org/security/2012/dsa-2470 (vendor-advisory)
Frequently asked questions
- What is CVE-2011-4957?
- CVE-2011-4957 is a vulnerability in WordPress, classified under Improper Input Validation. Published 2012-06-27.
- Is CVE-2011-4957 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.