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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 2.89% probability · 87th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-338
- Affected
- wordpress/wordpress
- Source
- cve@mitre.org
EPSS 2.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.