CVE-2026-75828
Grav before 2.0.15 Stored XSS via detectXss() Quote Bypass
- State
- Published
- Severity
- 9.3 Critical
- Published
- Aug 18, 2026
- Updated
- Oct 8, 2026
- Reserved
- Aug 18, 2026
Description
Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the detectXss() function where unpaired quotes in unquoted attribute values bypass event-handler detection. Authenticated editors can inject event handlers like onerror= that pass validation and execute in visitor browsers when page content is rendered.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N | VulnCheck |
| 3.1 | 8.7 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
gravgetgrav |
|
References
- GitHub Security Advisory (GHSA-vfmf-q6x9-cw96)vendor-advisory
- VulnCheck Advisory: Grav before 2.0.15 Stored XSS via detectXss() Quote Bypassthird-party-advisory
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