Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Grav before 2.0.14 contains a stored cross-site scripting vulnerability in the Security::detectXss() function (system/src/Grav/Common/Security.php). All XSS detection patterns use the PCRE /u (UTF-8) modifier, so a single invalid UTF-8 byte anywhere in page content causes preg_match() to return false for every pattern, silently bypassing the save-time XSS safety gate (Validation::checkSafety()). An authenticated attacker with page-edit permissions (without the security.xss_whitelist privilege) can store malicious JavaScript that executes in the browser of a visitor who views the affected page.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
CVE-2026-75834 Stored XSS in Grav Before 2.0.14 via Invalid UTF-8 Bypass https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-75834
Post summary
The post announces a stored XSS flaw in Grav CMS versions before 2.0.14, exploiting an invalid UTF‑8 bypass, with a link to a detailed vulnerability page.