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5.9

ActiveCampaign subscription forms may let attackers run code

CVE-2025-32136 · published 1 year ago
Summary

The subscription form feature in ActiveCampaign (versions up to 8.1.16) does not properly clean user input, allowing malicious code to be stored and later displayed to visitors. This could let attackers execute scripts in users' browsers, potentially stealing information or hijacking sessions. Update to the latest version of ActiveCampaign or apply the vendor's patch to fix the input handling.

Original advisory text
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in activecampaign ActiveCampaign activecampaign-subscription-forms allows Stored XSS.This issue af...
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in activecampaign ActiveCampaign activecampaign-subscription-forms allows Stored XSS.This issue affects ActiveCampaign: from n/a through <= 8.1.16.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.9 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published4 Apr 2025
Updated4 Nov 2026
First seen7 Mar 2026
Sources
CVE-2025-32136 · NVD
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