CVE-2021-25056Public exploitNetwork attack vector

Stored XSS via unescaped field labels

Published Jul 4, 2022 · Updated Aug 3, 2024

Stored XSS in Saturday Drive Ninja Forms before 3.6.10 allows remote authenticated users to inject scripts through field labels. The form builder stores field-label HTML without sufficient sanitization and renders the label without output escaping in the editor and embedded forms. Administrator-level access is required, unfiltered_html must be disabled or WordPress multisite used, and a victim must view the poisoned form.

CVSS severity4.8
Medium
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Saturday Drive Ninja Forms before 3.6.10 allows remote authenticated users to inject scripts through field labels. The form builder stores field-label HTML without sufficient sanitization and renders the label without output escaping in the editor and embedded forms. Administrator-level access is required, unfiltered_html must be disabled or WordPress multisite used, and a victim must view the poisoned form.

The record

CVE
CVE-2021-25056
Published
Jul 4, 2022
Updated
Aug 3, 2024
Vendor
Saturday Drive
Product
Ninja Forms
Classifications
CWE-79, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.6.10 <3.6.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Saturday Drive · Ninja Formsversion=3.6.10 <3.6.10

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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