Description
WordPress Core is vulnerable to Stored Cross-Site Scripting via the HTML API in various versions prior to 6.5.5 due to insufficient input sanitization and output escaping on URLs. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WordPress Foundation | WordPress | 5.9 – ≤ 5.9.9, 6.0 – ≤ 6.0.8, 6.1 – ≤ 6.1.6, 6.2 – ≤ 6.2.5, 6.3 – ≤ 6.3.4, 6.4 – ≤ 6.4.4, 6.5 – ≤ 6.5.4 | — |
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 | 6.5.5+dfsg1-1 | — |
| Debian 13 | wordpress | 6.5.5+dfsg1-1 | — |
| Debian 12 | wordpress | 6.1.9+dfsg1-0+deb12u1 | DSA-6075-1 |
| Debian 11 | wordpress | 5.7.14+dfsg1-0+deb11u1 | DLA-4358-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | wordpress | No fix yet | — |
| Ubuntu 22.04 LTS | wordpress | No fix yet | — |
| Ubuntu 20.04 LTS | wordpress | No fix yet | — |
| Ubuntu 18.04 LTS | wordpress | No fix yet | — |
| Ubuntu 16.04 LTS | wordpress | No fix yet | — |
Advisories 4
- DSA-6075-1 wordpress - security update Debian Security (DSA / DLA) · Dec 10, 2025
- WID-SEC-2024-1454 WordPress: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 9, 2025
- DLA-4358-1 wordpress - security update Debian Security (DSA / DLA) · Nov 2, 2025
- NCSC-2024-0266 Kwetsbaarheden verholpen in WordPress NCSC-NL (Netherlands) · Jun 25, 2024