openslides
Corrigé dans
3.2.1
CVE-2020-26280 affects OpenSlides versions 3.2 and earlier. OpenSlides is a web-based presentation and assembly management system. This vulnerability stems from insufficient user input validation and escaping, enabling persistent cross-site scripting (XSS). Successful exploitation could lead to malicious script execution within the application, impacting user sessions and data integrity. Version 3.3 provides a fix for this issue.
The XSS vulnerability in OpenSlides allows an attacker to inject arbitrary JavaScript code into various fields where users can enter rich text, such as personal notes or motions. When other users view this text, the injected script will execute in their browser context. This can have severe consequences, including session hijacking, redirection to malicious websites, and defacement of the OpenSlides interface. Crucially, an attacker could leverage this to manipulate votes during assemblies, potentially altering the outcome of decisions. The blast radius extends to all users who view the compromised text, making it a significant risk for organizations relying on OpenSlides for assembly management. The ability to inject and execute code within a trusted application like OpenSlides mirrors the impact of other high-profile XSS vulnerabilities, highlighting the importance of robust input validation.
CVE-2020-26280 was published on December 18, 2020. There is no indication of this vulnerability being actively exploited in the wild, nor is it currently listed on KEV or EPSS. Public proof-of-concept (POC) code is not widely available, which may contribute to the lack of observed exploitation. However, the ease of exploitation inherent in XSS vulnerabilities means that it remains a potential risk if OpenSlides instances are exposed to untrusted networks or users.
Statut de l'Exploit
EPSS
0.47% (percentile 65%)
Vecteur CVSS
The primary mitigation for CVE-2020-26280 is to upgrade OpenSlides to version 3.3 or later, which includes the necessary input validation fixes. If immediate upgrading is not feasible, consider implementing temporary workarounds. Web Application Firewalls (WAFs) configured to detect and block XSS payloads can provide a layer of defense. Specifically, look for rules that identify JavaScript injection attempts within rich text fields. Additionally, carefully review and sanitize all user-supplied input before displaying it within the application. After upgrading to version 3.3, verify the fix by attempting to inject a simple JavaScript payload (e.g., <script>alert('XSS')</script>) into a rich text field and confirming that it is properly sanitized and does not execute.
Actualice OpenSlides a la versión 3.3 o superior. Esta versión contiene una corrección para la vulnerabilidad XSS. La actualización se puede realizar a través del sistema de gestión de paquetes de Python o descargando la nueva versión del sitio web oficial.
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It's a cross-site scripting (XSS) vulnerability in OpenSlides versions 3.2 and earlier, allowing attackers to inject malicious JavaScript code.
If you are using OpenSlides version 3.2 or earlier, you are potentially affected by this vulnerability.
Upgrade to OpenSlides version 3.3 or later to resolve the XSS vulnerability. Implement WAF rules as a temporary measure.
There is currently no public evidence of active exploitation, but the vulnerability remains a potential risk.
Refer to the National Vulnerability Database (NVD) entry for CVE-2020-26280 for detailed information: https://nvd.nist.gov/vuln/detail/CVE-2020-26280
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