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Vulnerability record · CVE-2021-3920 · published 19 November 2021

CVE-2021-3920: Getgrav grav-plugin-admin cross-site scripting vulnerability

Getgrav · Grav Plugin Admin

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

5.4 CVSS 3.1 Medium EPSS 1.4% · top 29.1% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/getgrav/grav-plugin-admin/commit/6463135bf046d8131189c163158cd5db8f7a9675 PatchThird Party Advisory
https://huntr.dev/bounties/ab564760-90c6-4e1d-80c2-852f45034cd1 ExploitThird Party Advisory
https://github.com/getgrav/grav-plugin-admin/commit/6463135bf046d8131189c163158cd5db8f7a9675 PatchThird Party Advisory
https://huntr.dev/bounties/ab564760-90c6-4e1d-80c2-852f45034cd1 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-21425Grav Admin Plugin unauthenticated access control allows YAML write and RCEGrav Admin Plugin 1.10.7 and earlier lets an unauthenticated user invoke administrator controller methods without credentials. Those calls can create…EPSS 81%analysed6.8CVE-2025-66308Getgrav grav-plugin-admin cross-site scripting vulnerabilityThis admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.…EPSS 0.21%6.2CVE-2025-66310Getgrav grav-plugin-admin cross-site scripting vulnerabilityThis admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.…EPSS 0.21%6.2CVE-2025-66311Getgrav grav-plugin-admin cross-site scripting vulnerabilityThis admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.…EPSS 0.21%6.2CVE-2025-66312Getgrav grav-plugin-admin cross-site scripting vulnerabilityThis admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.…EPSS 0.21%6.2CVE-2025-66309Getgrav grav-plugin-admin cross-site scripting vulnerabilityThis admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.…EPSS 0.23%5.4CVE-2021-3799Getgrav grav-plugin-admin clickjacking vulnerabilitygrav-plugin-admin is vulnerable to Improper Restriction of Rendered UI Layers or FramesEPSS 1.6%5.3CVE-2025-66307Getgrav grav-plugin-admin vulnerabilityThis admin plugin for Grav is an HTML user interface that provides a convenient way to configure Grav and easily create and modify pages. Prior to 1.…EPSS 0.32%

Source: NIST National Vulnerability Database (record CVE-2021-3920), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.