CVE-2026-75828High· 8.7▾ TwilightGrav 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 o…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 47.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.3%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
getgrav/grav <= 2.0.14Patched in:
getgrav/grav 2.0.15Connected by shared product, vendor, weakness, or advisory.
GHSA-9pr6-8r9w-wvmjCritical· 8.7Duplicate Advisory: Grav: detectXss() misses an event-handler attribute after an unpaired quote in an unquoted attribute value, giving stored XSS
GHSA-993v-76jg-67xrMedium· 5.4Duplicate Advisory: Grav: Single invalid UTF-8 byte disables every rule in Security::detectXss(), bypassing the page-content XSS safety gate
GHSA-cgvr-f65r-pjv3Medium· 5.4Duplicate Advisory: Grav: Stored XSS via quoted-attribute bypass in detectXss
GHSA-q8cg-5m48-5c25Medium· 7.6Duplicate Advisory: Grav: Stored XSS via Markdown audio/video media <source> URL
GHSA-373m-p57p-8665Medium· 6.1Duplicate Advisory: Grav: XSS Blueprint Validation Bypass via Twig String Concatenation
CVE-2026-61453MediumGrav: XSS Blueprint Validation Bypass via Twig String Concatenation