Vulnerability in WordPress
CVE-2017-5493
wp-includes/ms-functions.php in the Multisite WordPress API in WordPress before 4.7.1 does not properly choose random numbers for keys, which makes it easier for remote attackers to bypass intended access restrictions via a crafted (1) site signup or (2) user signup.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.029 (86.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpvulndb.com/vulnerabilities/8721
- www.securityfocus.com/bid/95401 (vdb-entry)
- www.debian.org/security/2017/dsa-3779 (vendor-advisory)
- codex.wordpress.org/Version_4.7.1 (Release Notes, Vendor Advisory)
- www.openwall.com/lists/oss-security/2017/01/14/6 (mailing-list, Mailing List, Third Party Advisory)
- www.securitytracker.com/id/1037591 (vdb-entry)
- github.com/WordPress/WordPress/commit/cea9e2dc62abf777e06b12ec4ad9d1aaa49b29f4 (Patch)
- wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2017-5493?
- CVE-2017-5493 is a high-severity vulnerability in WordPress, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 7.5/10. Published 2017-01-15.
- How severe is CVE-2017-5493?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-5493 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.