CVE-2017-5493

Name: CVE-2017-5493
Creator: NVD / NIST
Published: 2017-01-15T02:59:03.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.89%

Last modified Jun 17, 2026

CVE-2017-5493 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.89% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

2.89%

85.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-338

Affected Software

Vendor	Product	Versions
Wordpress	Wordpress	<= 4.7

References

http://www.debian.org/security/2017/dsa-3779
http://www.openwall.com/lists/oss-security/2017/01/14/6Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/95401
http://www.securitytracker.com/id/1037591
https://codex.wordpress.org/Version_4.7.1Release Notes, Vendor Advisory
https://github.com/WordPress/WordPress/commit/cea9e2dc62abf777e06b12ec4ad9d1aaa49b29f4Patch
https://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/Vendor Advisory
https://wpvulndb.com/vulnerabilities/8721
http://www.debian.org/security/2017/dsa-3779
http://www.openwall.com/lists/oss-security/2017/01/14/6Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/95401
http://www.securitytracker.com/id/1037591
https://codex.wordpress.org/Version_4.7.1Release Notes, Vendor Advisory
https://github.com/WordPress/WordPress/commit/cea9e2dc62abf777e06b12ec4ad9d1aaa49b29f4Patch
https://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/Vendor Advisory
https://wpvulndb.com/vulnerabilities/8721

Timeline

Published: Jan 15, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-5493?

How severe is CVE-2017-5493?

Severity scoring for CVE-2017-5493 is pending analysis. The EPSS model estimates a 2.89% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5493?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-5493?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST