CVE-2021-24985Public exploitNetwork attack vector

Reflected XSS via unescaped form field attributes

Published Jan 24, 2022 · Updated Aug 3, 2024

Reflected XSS in Easy Forms for Mailchimp before 6.8.6 allows remote attackers to execute script in a user's browser via crafted form fields. The add_field_to_form AJAX action inserts field_name and field_type into HTML attributes without sanitizing or attribute-escaping them. Exploitation requires user interaction with an attacker-controlled POST, after which the returned script executes in the WordPress site's origin.

CVSS severity6.1
Medium
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Easy Forms for Mailchimp before 6.8.6 allows remote attackers to execute script in a user's browser via crafted form fields. The add_field_to_form AJAX action inserts field_name and field_type into HTML attributes without sanitizing or attribute-escaping them. Exploitation requires user interaction with an attacker-controlled POST, after which the returned script executes in the WordPress site's origin.

The record

CVE
CVE-2021-24985
Published
Jan 24, 2022
Updated
Aug 3, 2024
Vendor
YIKES, Inc.
Product
Easy Forms for Mailchimp
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 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

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Is a vulnerable build present?

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

  1. Affected versionversion=6.8.6 <6.8.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

YIKES, Inc. · Easy Forms for Mailchimpversion=6.8.6 <6.8.6

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
Privilegesunauthenticated
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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