CVE-2016-6635

high

Published 2016-08-07 · Modified 2026-05-06

CVSS v3

8.8

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2

6.8

VIR risk

8.8

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.

Predictions

Exploit likelihood

92%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-6635

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://github.com/WordPress/WordPress/commit/9b7a7754133c50b82bd9d976fb5b24094f658aab

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://codex.wordpress.org/Version_4.5

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`4.5+dfsg-1`
debian	bullseye	fixed	`4.5+dfsg-1`
debian	forky	fixed	`4.5+dfsg-1`
debian	sid	fixed	`4.5+dfsg-1`
debian	trixie	fixed	`4.5+dfsg-1`

Application impact

Vendor	Product	Versions	Fixed
wordpress	wordpress	`{"endIncluding":"4.4.2"}`

References

CWEs

CWE-352

Verify integrity in audit chain (admin only). AS-IS.