CVE-2023-5561

Name: CVE-2023-5561
Creator: NVD / NIST
Published: 2023-10-16T20:15:18.073+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 3.86%

Last modified Jun 17, 2026

CVE-2023-5561 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. WordPress does not properly restrict which user fields are searchable via the REST API, allowing unauthenticated attackers to discern the email addresses of users who have published public posts on an affected website via an Oracle style attack. EPSS estimates a 3.86% chance of exploitation in the next 30 days.

Description

WordPress does not properly restrict which user fields are searchable via the REST API, allowing unauthenticated attackers to discern the email addresses of users who have published public posts on an affected website via an Oracle style attack

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

3.86%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Wordpress	Wordpress	>= 4.7, < 4.7.27
Wordpress	Wordpress	>= 4.8, < 4.8.23
Wordpress	Wordpress	>= 4.9, < 4.9.24
Wordpress	Wordpress	>= 5.0, < 5.0.20
Wordpress	Wordpress	>= 5.1, < 5.1.17
Wordpress	Wordpress	>= 5.2, < 5.2.19
Wordpress	Wordpress	>= 5.3, < 5.3.16
Wordpress	Wordpress	>= 5.4, < 5.4.14
Wordpress	Wordpress	>= 5.5, < 5.5.13
Wordpress	Wordpress	>= 5.6, < 5.6.12
Wordpress	Wordpress	>= 5.7, < 5.7.10
Wordpress	Wordpress	>= 5.8, < 5.8.8
Wordpress	Wordpress	>= 5.9, < 5.9.8
Wordpress	Wordpress	>= 6.0, < 6.0.6
Wordpress	Wordpress	>= 6.1, < 6.1.4
Wordpress	Wordpress	>= 6.2, < 6.2.3
Wordpress	Wordpress	>= 6.3, < 6.3.2

References

https://lists.debian.org/debian-lts-announce/2023/11/msg00014.html
https://wpscan.com/blog/email-leak-oracle-vulnerability-addressed-in-wordpress-6-3-2/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/19380917-4c27-4095-abf1-eba6f913b441Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/11/msg00014.html
https://wpscan.com/blog/email-leak-oracle-vulnerability-addressed-in-wordpress-6-3-2/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/19380917-4c27-4095-abf1-eba6f913b441Third Party Advisory

Timeline

Published: Oct 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5561?

How severe is CVE-2023-5561?

CVE-2023-5561 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 3.86% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5561?

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-2023-5561?

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

Scan your code now

Source: NVD / NIST