CVE-2017-5487
MediumPublic exploitwp-includes/rest-api/endpoints/class-wp-rest-users-controller.php in the REST API implementation in WordPress 4.7 before 4.7.1 does not properly restrict listings of post authors, which allows remote attackers to obtain sensitive information via a wp-json/wp/v2/users request.
Published Jan 15, 2017 · Updated Aug 4, 2026 · Also known as 2b300f55-f1ee-4345-adc2-32cd3b081a30, DEBIAN-CVE-2017-5487
Key Facts
Patch immediately- CVE-2017-5487 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting Wordpress.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 87% probability of exploitation in the next 30 days.
- Fixed versions are available, including Wordpress 3.7.17, Wordpress 4.7.1-1, Wordpress 4.7.1+dfsg-1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
87%
Higher than 99.7% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php in the REST API implementation in WordPress 4.7 before 4.7.1 does not properly restrict listings of post authors, which allows remote attackers to obtain sensitive information via a wp-json/wp/v2/users request.
Affected Products
14 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WordpressWordpress | >= 3.7 | 4.7 |
Patched Releases
Wordpress
3.7.17, 4.7.1-1, 4.7.1+dfsg-1, 4.7
Timeline
Publicly disclosed
Jan 15, 2017
Last updated
Aug 4, 2026
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
- advisoryhttps://codex.wordpress.org/Version_4.7.1
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2017-5487
- advisoryhttps://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/
- advisoryhttps://www.wordfence.com/blog/2016/12/wordfence-blocks-username-harvesting-via-new-rest-api-wp-4-7/
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/2b300f55-f1ee-4345-adc2-32cd3b081a30?source=api-prod
FAQ
Common Questions.
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php in the REST API implementation in WordPress 4.7 before 4.7.1 does not properly restrict listings of post authors, which allows remote attackers to obtain sensitive information via a wp-json/wp/v2/users request.
Affected: Wordpress versions >= 3.7. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Wordpress 3.7.17, Wordpress 4.7.1-1, Wordpress 4.7.1+dfsg-1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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