CVE-2025-66843

Name: CVE-2025-66843
Creator: NVD / NIST
Published: 2025-12-15T16:15:53.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2025-66843 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.14%

3.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Getgrav	Grav	< 1.7.49.5

References

https://github.com/Yohane-Mashiro/grav_cve/issues/1Exploit, Issue Tracking, Third Party Advisory
https://github.com/Yohane-Mashiro/grav_cve/issues/1Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Dec 15, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66843?

How severe is CVE-2025-66843?

CVE-2025-66843 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2025-66843?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66843?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST