How severe is CVE-2021-3920?

CVE-2021-3920 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-2021-3920 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3920?

CVE-2021-3920 affects Getgrav Grav-plugin-admin. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3920?

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

When was CVE-2021-3920 published?

CVE-2021-3920 was published on 2021-11-19 and last updated on 2026-06-17.

CVE-2021-3920

CVE-2021-3920 is a medium-severity vulnerability in Getgrav Grav-plugin-admin 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)
CVSS v2: 3.5
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Getgrav Grav-plugin-admin
Published: 2021-11-19
Last modified: 2026-06-17

Description

grav-plugin-admin is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Frequently asked questions

What is CVE-2021-3920?: grav-plugin-admin is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
How severe is CVE-2021-3920?: CVE-2021-3920 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-2021-3920 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3920?: CVE-2021-3920 affects Getgrav Grav-plugin-admin. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3920?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3920 published?: CVE-2021-3920 was published on 2021-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:getgrav:grav-plugin-admin:*:*:*:*:*:*:*:*

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