Description
Cross-site request forgery (CSRF) vulnerability in the wp_ajax_wp_compression_test function in wp-admin/includes/ajax-actions.php in WordPress before 4.5 allows remote attackers to hijack the authentication of administrators for requests that change the script compression option.
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 | 4.5+dfsg-1 | — |
| Debian 13 | wordpress | 4.5+dfsg-1 | — |
| Debian 12 | wordpress | 4.5+dfsg-1 | — |
| Debian 8 | wordpress | 4.1+dfsg-1+deb8u10 | DSA-3681-1 |
| Debian 7 | wordpress | 3.6.1+dfsg-1~deb7u12 | DLA-633-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | wordpress | No fix yet | — |
Advisories 2
- DLA-633-1 wordpress - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3681-1 wordpress - security update Debian Security (DSA / DLA) · Mar 9, 2026