CVE-2019-17673

Name: CVE-2019-17673
Creator: NVD / NIST
Published: 2019-10-17T13:15:11.077+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.15%

Last modified Jun 17, 2026

CVE-2019-17673 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. WordPress before 5.2.4 is vulnerable to poisoning of the cache of JSON GET requests because certain requests lack a Vary: Origin header.. EPSS estimates a 3.15% chance of exploitation in the next 30 days.

Description

WordPress before 5.2.4 is vulnerable to poisoning of the cache of JSON GET requests because certain requests lack a Vary: Origin header.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.15%

86.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Wordpress	Wordpress	< 5.2.4
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://blog.wpscan.org/wordpress/security/release/2019/10/15/wordpress-524-security-release-breakdown.htmlThird Party Advisory
https://core.trac.wordpress.org/changeset/46478Patch, Vendor Advisory
https://github.com/WordPress/WordPress/commit/b224c251adfa16a5f84074a3c0886270c9df38dePatch, Third Party Advisory
https://seclists.org/bugtraq/2020/Jan/8Mailing List, Third Party Advisory
https://wordpress.org/news/2019/10/wordpress-5-2-4-security-release/Release Notes, Vendor Advisory
https://wpvulndb.com/vulnerabilities/9911Third Party Advisory
https://www.debian.org/security/2020/dsa-4599Third Party Advisory
https://www.debian.org/security/2020/dsa-4677Third Party Advisory
https://blog.wpscan.org/wordpress/security/release/2019/10/15/wordpress-524-security-release-breakdown.htmlThird Party Advisory
https://core.trac.wordpress.org/changeset/46478Patch, Vendor Advisory
https://github.com/WordPress/WordPress/commit/b224c251adfa16a5f84074a3c0886270c9df38dePatch, Third Party Advisory
https://seclists.org/bugtraq/2020/Jan/8Mailing List, Third Party Advisory
https://wordpress.org/news/2019/10/wordpress-5-2-4-security-release/Release Notes, Vendor Advisory
https://wpvulndb.com/vulnerabilities/9911Third Party Advisory
https://www.debian.org/security/2020/dsa-4599Third Party Advisory
https://www.debian.org/security/2020/dsa-4677Third Party Advisory

Timeline

Published: Oct 17, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-17673?

WordPress before 5.2.4 is vulnerable to poisoning of the cache of JSON GET requests because certain requests lack a Vary: Origin header.

How severe is CVE-2019-17673?

CVE-2019-17673 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.15% probability of exploitation in the next 30 days.

How do I fix CVE-2019-17673?

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-2019-17673?

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

Scan your code now

Source: NVD / NIST