Description
Before WordPress 4.9.5, the version string was not escaped in the get_the_generator function, and could lead to XSS in a generator tag.
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 | — |
| Debian 9 | wordpress | 4.7.5+dfsg-2+deb9u3 | DSA-4193-1 |
| Debian 8 | wordpress | 4.1+dfsg-1+deb8u17 | DSA-4193-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | wordpress | 3.6.1+dfsg-1~deb7u21 | DLA-1366-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | wordpress | No fix yet | — |
Advisories 2
- DSA-4193-1 wordpress - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1366-1 wordpress - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- 103775 vdb-entry
- https://wpvulndb.com/vulnerabilities/9055
- 1040836 vdb-entry
- DSA-4193 vendor-advisory
- https://core.trac.wordpress.org/changeset/42893
- https://wordpress.org/news/2018/04/wordpress-4-9-5-security-and-maintenance-release/
- [debian-lts-announce] 20180427 [SECURITY] [DLA 1366-1] wordpress security update mailing-list
- https://codex.wordpress.org/Version_4.9.5
- https://github.com/WordPress/WordPress/commit/31a4369366d6b8ce30045d4c838de2412c77850d