Description (CNA)
Grav Admin (getgrav/grav-plugin-admin2) versions <= 2.0.19 contain a stored cross-site scripting vulnerability in the tHtml() function (src/lib/stores/i18n.svelte.ts), which substitutes untrusted parameters such as usernames into translation templates before parsing the result as markdown. Grav's server-side username validation (DataUser::isValidUsername) blocks filesystem-dangerous characters but not <, >, ", or ', allowing an attacker to register a username containing an HTML payload. When an administrator views a UI surface that renders the username through tHtml()—such as the two-factor force-disable confirmation prompt or the 'page is locked' editor notice—the payload executes in their authenticated session. Fixed in 2.0.21.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| getgrav / grav-plugin-admin2 | affected 0 through 2.0.19; unaffected 2.0.21 |
CWE
CWE-79
References
- https://github.com/getgrav/grav/security/advisories/GHSA-96xm-c5hr-59rx
- https://www.vulncheck.com/advisories/grav-admin-before-2.0.21-stored-xss-via-username
ADP enrichment
No English description supplied.