by Kastro
Paper/Archive/CVE-2026-75828

CVE-2026-75828

getgrav grav — Grav before 2.0.15 Stored XSS via detectXss() Quote Bypass

EPSS 0.4%public exploitCVSS 9.3
critical.is priorityof 100
45
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 33.0.330 × 206.6Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
grav< 2.0.152.0.15CNA

Scores by source

VulnCheck (CNA)9.3CVSS: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 (CNA)8.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/getgrav/grav/security/advisories/GHSA-vfmf-q6x9-cw96writeupvulncheck.com/advisories/grav-before-stored-xss-via-detectxss-quote-bypass