Stored Cross-Site Scripting Vulnerability in Grav by Getgrav
CVE-2026-75828

9.3CRITICAL

Key Information:

Vendor

Getgrav

Status
Grav
Vendor
CVE Published:
18 August 2026

What is CVE-2026-75828?

Grav prior to version 2.0.15 is vulnerable to a stored cross-site scripting flaw in the detectXss() function. This vulnerability occurs when unpaired quotes in unquoted attribute values allow authenticated editors to bypass event-handler detection. As a result, malicious event handlers like onerror= can be injected and validated, enabling their execution in the browsers of visitors when pages are rendered. This poses a significant risk, enabling attackers to manipulate user experiences and potentially compromise user data.

Affected Version(s)

grav 0 < 2.0.15

grav 2.0.15

References

https://github.com/getgrav/grav/security/advisories/GHSA-...
vendor-advisory
https://www.vulncheck.com/advisories/grav-before-stored-x...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

arpitjain099
.