What is CVE-2025-66843?

CVE-2025-66843 is a medium-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-15.

How severe is CVE-2025-66843?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Getgrav Grav

CVE-2025-66843

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (3.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Getgrav Grav
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2025-66843?: CVE-2025-66843 is a medium-severity vulnerability in Getgrav Grav, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-12-15.
How severe is CVE-2025-66843?: Medium severity. CVSS v3 base score is 5.4 out of 10.