CVE-2025-66843

🔶 medium

Summary

grav before v1.7.49.5 has a Stored Cross-Site Scripting (Stored XSS) vulnerability in the page editing functionality. An authenticated low-privileged user with permission to edit content can inject malicious JavaScript payloads into editable fields. The payload is stored on the server and later executed when any other user views or edits the affected page.

CVSS Score

5.4

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2025-12-15

First Seen: 2026-01-05

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 22.9% of all 321,566 vulnerabilities in our database.

#247,909

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Dec 16, 2025

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2025-12-17

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-79

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
getgrav	grav	Affected	< 1.7.49.5

🔗 References 1

https://github.com/Yohane-Mashiro/grav_cve/issues/1

Exploit Issue Tracking Third Party Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-42844	⚠️ high	8.8	0.0	Grav is a file-based Web platform. In Grav 2.0.0-beta.2, a low-privileged authenticated API user with api.media.write ca...	2026-05-12
CVE-2026-42609	⚠️ high	8.1	0.0	Grav is a file-based Web platform. Prior to 2.0.0-beta.2, a business logic vulnerability in the Grav Admin Panel allows ...	2026-05-11
CVE-2026-44738	⚠️ high	7.7	0.0	Grav is a file-based Web platform. Prior to 2.0.0-rc.2, the Twig sandbox allow-list permits any user with the admin.page...	2026-05-11
CVE-2026-29924	⚠️ high	7.6	0.1	Grav CMS v1.7.x and before is vulnerable to XML External Entity (XXE) through the SVG file upload functionality in the a...	2026-03-30
CVE-2021-47812	⛔ critical	9.8	0.3	GravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configurat...	2026-01-16
CVE-2025-66844	⛔ critical	9.1	0.1	In grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page content is ...	2025-12-15

These CVEs affect the same products