Cyber Resilience

CVE-2026-42612

HighPublic PoC

Published: 11 May 2026

Published
11 May 2026
Modified
12 May 2026
KEV Added
—
Patch
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CVSS Score v3.1 8.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
EPSS Score 0.0024 14.8th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-42612 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Getgrav Grav. Its CVSS base score is 8.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 14.8th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a stored Cross-Site Scripting (XSS) vulnerability in getgrav/grav allows publisher-level accounts to execute arbitrary JavaScript. The issue arises from a blacklist bypass in the detectXss() function when handling unquoted HTML event…

more

attributes. This vulnerability is fixed in 2.0.0-beta.2.

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.007 JavaScript Execution
Adversaries may abuse various implementations of JavaScript for execution.
attack.mitre.org →
Why these techniques?

Stored XSS enables direct arbitrary JS execution against the public-facing Grav web platform (T1190) via the JavaScript interpreter (T1059.007).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-42611Same product: Getgrav Grav
CVE-2025-46199Same product: Getgrav Grav
CVE-2025-46198Same product: Getgrav Grav
CVE-2021-47812Same product: Getgrav Grav
CVE-2026-42608Same product: Getgrav Grav
CVE-2025-66294Same product: Getgrav Grav
CVE-2026-29924Same product: Getgrav Grav
CVE-2025-66299Same product: Getgrav Grav
CVE-2025-50286Same product: Getgrav Grav
CVE-2025-66297Same product: Getgrav Grav

Affected Assets

getgrav
grav
2.0.0 · ≤ 1.8.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References