CVE-2024-8870: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in fatcatapps Forms for Mailchimp by Optin Cat – Grow Your MailChimp List
The Forms for Mailchimp by Optin Cat – Grow Your MailChimp List plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.5.7. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
AI Analysis
Technical Summary
CVE-2024-8870 is a reflected cross-site scripting vulnerability in the Forms for Mailchimp by Optin Cat – Grow Your MailChimp List WordPress plugin. The issue arises from the use of add_query_arg without proper escaping of URL parameters in all versions up to and including 2.5.7. This allows unauthenticated attackers to inject arbitrary web scripts that execute when a victim clicks a maliciously crafted link. The vulnerability is classified under CWE-79 and has a CVSS 3.1 base score of 6.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, no privileges required, user interaction needed, scope changed, and low impact on confidentiality and integrity, with no impact on availability.
Potential Impact
Successful exploitation can lead to execution of arbitrary scripts in the context of the victim's browser session, potentially allowing theft of sensitive information or session tokens. The impact is limited to confidentiality and integrity with no direct availability impact. The vulnerability requires user interaction (clicking a crafted link) and affects all plugin versions up to 2.5.7. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with links related to this plugin and consider disabling or removing the plugin if possible. Monitor the vendor's communications for updates on patches or official fixes.
CVE-2024-8870: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in fatcatapps Forms for Mailchimp by Optin Cat – Grow Your MailChimp List
Description
The Forms for Mailchimp by Optin Cat – Grow Your MailChimp List plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.5.7. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-8870 is a reflected cross-site scripting vulnerability in the Forms for Mailchimp by Optin Cat – Grow Your MailChimp List WordPress plugin. The issue arises from the use of add_query_arg without proper escaping of URL parameters in all versions up to and including 2.5.7. This allows unauthenticated attackers to inject arbitrary web scripts that execute when a victim clicks a maliciously crafted link. The vulnerability is classified under CWE-79 and has a CVSS 3.1 base score of 6.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N), reflecting network attack vector, low attack complexity, no privileges required, user interaction needed, scope changed, and low impact on confidentiality and integrity, with no impact on availability.
Potential Impact
Successful exploitation can lead to execution of arbitrary scripts in the context of the victim's browser session, potentially allowing theft of sensitive information or session tokens. The impact is limited to confidentiality and integrity with no direct availability impact. The vulnerability requires user interaction (clicking a crafted link) and affects all plugin versions up to 2.5.7. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should exercise caution with links related to this plugin and consider disabling or removing the plugin if possible. Monitor the vendor's communications for updates on patches or official fixes.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Wordfence
- Date Reserved
- 2024-09-15T00:20:35.927Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 699f6b38b7ef31ef0b54f68c
Added to database: 2/25/2026, 9:35:52 PM
Last enriched: 4/9/2026, 3:18:31 PM
Last updated: 4/12/2026, 10:34:58 AM
Views: 17
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