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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | wordpress | 5.2.4+dfsg1-1 | — |
| Debian 13 | wordpress | 5.2.4+dfsg1-1 | — |
| Debian 12 | wordpress | 5.2.4+dfsg1-1 | — |
| Debian 10 | wordpress | 5.0.4+dfsg1-1+deb10u1 | DSA-4599-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | wordpress | No fix yet | — |
| Ubuntu 16.04 LTS | wordpress | No fix yet | — |
Advisories 1
- DSA-4599-1 wordpress - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://wpvulndb.com/vulnerabilities/9911
- https://blog.wpscan.org/wordpress/security/release/2019/10/15/wordpress-524-security-release-breakdown.html
- https://wordpress.org/news/2019/10/wordpress-5-2-4-security-release/
- https://core.trac.wordpress.org/changeset/46478
- https://github.com/WordPress/WordPress/commit/b224c251adfa16a5f84074a3c0886270c9df38de
- 20200108 [SECURITY] [DSA 4599-1] wordpress security update mailing-list
- DSA-4599 vendor-advisory
- DSA-4677 vendor-advisory