Campaign Monitor Forms <= 2.5.5 - Missing Authorization to Authenticated(Subscriber+) Options Update via ajax_dismiss_notice
Strategic Overview
- Status
- Patched in 2.5.6
- Affected Plugin
- Campaign Monitor Forms by Optin Cat
- Affected Version
<= 2.5.5- CVSS
- 7.1High
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2023-5098
At a glance
CVE-2023-5098 is a high-severity Missing Authorization vulnerability in the Campaign Monitor Forms by Optin Cat WordPress plugin, affecting versions <= 2.5.5. It carries a CVSS score of 7.1 (reachable over the network; low attack complexity; high availability impact). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 2.5.6; sites on affected versions should update now. Disclosed October 2023, reported by Francesco Marano.
Vulnerability Overview
The Campaign Monitor Forms plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajax_dismiss_notice function in versions up to, and including, 2.5.5. This makes it possible for authenticated attackers to update arbitrary options to a value of 'true'.
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 interaction from a victim user. A successful exploit has high impact on availability.
CWE-862: Missing Authorization
Campaign Monitor Forms by Optin Cat <= 2.5.5 carries this weakness at true, and reaching it takes an account at Subscriber level or above. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.
Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Campaign Monitor Forms by Optin Cat the fix is 2.5.6: builds <= 2.5.5 are affected, anything from 2.5.6 onward is not.
Remediation
Update to version 2.5.6, or a newer patched version
How does WordSec protect against this?
Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Campaign Monitor Forms by Optin Cat 2.5.6 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Campaign Monitor Forms by Optin Cat
Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C