Platform
python
Component
modoboa
Fixed in
2.2.2
2.2.2
CVE-2023-5688 is a critical Cross-Site Scripting (XSS) vulnerability affecting the modoboa email hosting platform. This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users, potentially leading to account takeover and data theft. The vulnerability impacts versions of modoboa up to and including 2.2.1. A fix is available in version 2.2.2.
The impact of this XSS vulnerability is significant. An attacker could leverage it to execute arbitrary JavaScript code within the context of a user's browser session. This could be used to steal session cookies, redirect users to phishing sites, or deface the modoboa interface. Successful exploitation could compromise sensitive email data, user accounts, and potentially the entire email hosting infrastructure. The DOM-based nature of the XSS means that the attack doesn't necessarily rely on reflected input, making it potentially more difficult to detect and mitigate using traditional input validation techniques. This vulnerability shares similarities with other DOM-based XSS attacks, where user-controlled data is processed without proper sanitization before being rendered in the DOM.
CVE-2023-5688 was publicly disclosed on 2023-10-20. No known active exploitation campaigns have been reported at the time of writing, but the vulnerability's critical severity and ease of exploitation make it a high-priority target. The vulnerability is not currently listed on the CISA KEV catalog. Public proof-of-concept exploits are likely to emerge given the vulnerability's nature and severity.
Exploit Status
EPSS
0.16% (37% percentile)
CVSS Vector
The primary mitigation for CVE-2023-5688 is to immediately upgrade modoboa to version 2.2.2 or later. If upgrading is not immediately feasible, consider implementing a Web Application Firewall (WAF) with rules to detect and block XSS payloads targeting the vulnerable areas of the modoboa application. Carefully review and sanitize any user-supplied data before rendering it in the DOM. Monitor modoboa logs for suspicious activity, such as unusual JavaScript execution or attempts to access sensitive data. While a direct detection signature is difficult to create, monitor for unusual network traffic originating from the modoboa server and targeting user browsers. After upgrading, confirm the fix by attempting to inject a simple XSS payload into a vulnerable input field and verifying that it is properly sanitized.
Update modoboa to version 2.2.2 or higher. This version contains a fix for the XSS vulnerability. You can update using pip: `pip install --upgrade modoboa`.
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CVE-2023-5688 is a critical DOM-based Cross-Site Scripting vulnerability in modoboa email hosting platform versions up to 2.2.1, allowing attackers to inject malicious scripts.
Yes, if you are running modoboa version 2.2.1 or earlier, you are vulnerable to this XSS attack. Upgrade to 2.2.2 or later immediately.
The recommended fix is to upgrade modoboa to version 2.2.2 or later. If upgrading is not possible, implement WAF rules and monitor logs.
While no active exploitation campaigns have been confirmed, the vulnerability's severity and ease of exploitation make it a likely target.
Refer to the modoboa security advisory on their GitHub repository for details and updates: https://github.com/modoboa/modoboa/security/advisories/GHSA-749x-692x-496r
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