Strategic Overview
- Status
- Patched in 8.0.2
- Affected Plugin
- ActiveCampaign – The autonomous marketing platform
- Affected Version
< 8.0.2- CVSS
- 4.3Medium
- Weakness type
- CWE-352 · Cross-Site Request Forgery (CSRF)
- CVE
CVE-2021-24133
At a glance
CVE-2021-24133 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the ActiveCampaign WordPress plugin, affecting versions < 8.0.2. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 8.0.2; sites on affected versions should update now. Disclosed September 2020, reported by Nguyen Anh Tien.
Vulnerability Overview
Lack of CSRF checks in the ActiveCampaign WordPress plugin, versions before 8.0.2, on its Settings form, which could allow attacker to make a logged-in administrator change API Credentials to attacker's account.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-352: Cross-Site Request Forgery (CSRF)
Reaching this weakness in ActiveCampaign < 8.0.2 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.
An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For ActiveCampaign the fix is 8.0.2: builds < 8.0.2 are affected, anything from 8.0.2 onward is not.
Remediation
Update to version 8.0.2, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to ActiveCampaign: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: ActiveCampaign 8.0.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Other vulnerabilities in ActiveCampaign – The autonomous marketing platform
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