Is there a patch available for CVE-2026-61453?

Yes, a patch is available for CVE-2026-61453. Update the affected software to the latest version immediately.

Grav CVE-2026-61453

Q: What is the CVSS score of CVE-2026-61453?

CVE-2026-61453 has a CVSS 4.0 base score of 5.1 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.2%.

EUVD-2026-44650 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-07-15 VulnCheck

GHSA-373m-p57p-8665

XSS Grav Getgrav

5.1

CVSS 4.0 · Vendor: VulnCheck

Severity by source

Vendor (VulnCheck) PRIMARY

5.1 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

vuln.today AI

5.4 MEDIUM

Page-write API permission is explicitly required (PR:L); victim must visit the page (UI:R); XSS crosses into browser scope requiring S:C; no availability impact.

3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

4.0 AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Patch available

Jul 15, 2026 - 13:03 EUVD

Analysis Generated

Jul 15, 2026 - 12:34 vuln.today

DescriptionCVE.org

Grav v2.0.0 contains a cross-site scripting vulnerability (fixed in 2.0.1). The XSS blueprint validator (Security::detectXss()) runs on raw page content before Twig processing. When Twig content processing is enabled (twig_content.process_enabled: true), an attacker with page-write API permission can use Twig's string concatenation operator (~) to dynamically construct event handler names, dangerous tag names, or dangerous protocols at render time (e.g. {% set x = "on" ~ "error" %}). The validator sees only the harmless Twig expression and allows the content, but after Twig rendering the output (rendered via {{ page.content|raw }}) contains an active payload such as <img src=1 onerror=alert(1)>, executing arbitrary JavaScript in visitors' browsers.

AnalysisAI

Stored cross-site scripting (XSS) in Grav CMS 2.0.0 allows authenticated attackers with page-write API permission to inject JavaScript payloads that execute in visitors' browsers. The vulnerability arises when Twig content processing is enabled, leveraging Twig's string concatenation operator to bypass the XSS validator. Patched in version 2.0.1; proof-of-concept code is available but no known active exploitation.