What is CVE-2007-6013?

CVE-2007-6013 is a critical-severity vulnerability in WordPress, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 9.8/10. Published 2007-11-19.

How severe is CVE-2007-6013?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2007-6013 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in WordPress

CVE-2007-6013

Wordpress 1.5 through 2.3.1 uses cookie values based on the MD5 hash of a password MD5 hash, which allows attackers to bypass authentication by obtaining the MD5 hash from the user database, then generating the authentication cookie from that hash.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2007-11-19 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.033 (88.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

WordPress
Fedoraproject Fedora — versions 7, 8

Weakness classification (CWE)

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

Public proof-of-concept exploits

20142995/nuclei-templates

References

lists.grok.org.uk/pipermail/full-disclosure/2007-November/058576.html (mailing-list, Broken Link)
www.redhat.com/archives/fedora-package-announce/2008-January/msg00098.html (vendor-advisory, Mailing List)
www.cl.cam.ac.uk/~sjm217/advisories/wordpress-cookie-auth.txt (Third Party Advisory)
trac.wordpress.org/ticket/5367 (Exploit, Issue Tracking)
securityreason.com/securityalert/3375 (Broken Link, third-party-advisory)
www.securityfocus.com/archive/1/483927/100/0/threaded (mailing-list, VDB Entry, Third Party Advisory, Broken Link)
www.vupen.com/english/advisories/2007/3941 (vdb-entry, Broken Link, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/38578 (VDB Entry, Third Party Advisory, vdb-entry)
secunia.com/advisories/28310 (Broken Link, Vendor Advisory, third-party-advisory)
www.securitytracker.com/id (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)

Frequently asked questions

What is CVE-2007-6013?: CVE-2007-6013 is a critical-severity vulnerability in WordPress, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 9.8/10. Published 2007-11-19.
How severe is CVE-2007-6013?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2007-6013 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.