Description
Before WordPress 4.9.5, the URL validator assumed URLs with the hostname localhost were on the same host as the WordPress server.
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 | 4.9.5+dfsg1-1 | — |
| Debian 13 | wordpress | 4.9.5+dfsg1-1 | — |
| Debian 12 | wordpress | 4.9.5+dfsg1-1 | — |
References
- https://wpvulndb.com/vulnerabilities/9053
- 104350 vdb-entry
- 1040836 vdb-entry
- DSA-4193 vendor-advisory
- https://wordpress.org/news/2018/04/wordpress-4-9-5-security-and-maintenance-release/
- https://core.trac.wordpress.org/changeset/42894
- https://codex.wordpress.org/Version_4.9.5
- https://github.com/WordPress/WordPress/commit/804363859602d4050d9a38a21f5a65d9aec18216