Description
Directory traversal vulnerability in the File_Upload_Upgrader class in wp-admin/includes/class-file-upload-upgrader.php in the upgrade package uploader in WordPress before 4.6.1 allows remote authenticated users to access arbitrary files via a crafted urlholder parameter.
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 | 4.6.1+dfsg-1 | — |
| Debian 13 | wordpress | 4.6.1+dfsg-1 | — |
| Debian 12 | wordpress | 4.6.1+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