How severe is CVE-2025-66843?

CVE-2025-66843 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-66843 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66843?

CVE-2025-66843 affects Getgrav Grav. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66843?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66843 have an EU (EUVD) identifier?

Yes. CVE-2025-66843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203401.

When was CVE-2025-66843 published?

CVE-2025-66843 was published on 2025-12-15 and last updated on 2026-06-17.

CVE-2025-66843

CVE-2025-66843 is a medium-severity vulnerability in Getgrav Grav with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203401
Weakness: CWE-79
Affected product: Getgrav Grav
Published: 2025-12-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-66843?: CVE-2025-66843 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-66843 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66843?: CVE-2025-66843 affects Getgrav Grav. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66843?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66843 have an EU (EUVD) identifier?: Yes. CVE-2025-66843 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203401.
When was CVE-2025-66843 published?: CVE-2025-66843 was published on 2025-12-15 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*

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