Answer in brief
CVE-2026-85600 records a Medium severity (CVSS 5.4) vulnerability in Grav Admin before 2.0.21 Stored XSS via username. The current sources do not mark it as known exploited. The current feed maps getgrav/grav (generic), getgrav/grav-plugin-admin2 (generic), getgrav/grav-plugin-admin2 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps getgrav/grav (generic), getgrav/grav-plugin-admin2 (generic), getgrav/grav-plugin-admin2 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| getgrav/gravgeneric | >=0 <2.0.21 | 2.0.21 |
| getgrav/grav-plugin-admin2generic | 0 | Not reported |
| getgrav/grav-plugin-admin2generic | >=0 <=2.0.19 | Not reported |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.