Plattform
otrs
Komponente
otrs
Behoben in
5.0.1
6.0.1
7.0.1
CVE-2020-1766 describes a cross-site scripting (XSS) vulnerability affecting OTRS, a popular open-source support ticket system. This vulnerability arises from improper handling of uploaded images, allowing an attacker to potentially execute malicious JavaScript within an agent's browser. The vulnerability impacts OTRS Community Edition 5.0.x versions prior to 5.0.39, 6.0.x versions prior to 6.0.24, and 7.0.x versions prior to 7.0.14. A fix is available in version 7.0.14.
Successful exploitation of CVE-2020-1766 could allow an attacker to execute arbitrary JavaScript code within the context of an authenticated OTRS agent's session. This could lead to session hijacking, credential theft, or the defacement of the OTRS interface. While the vulnerability requires a specific SVG file upload and rendering condition, the potential impact is significant, as it could compromise the security of the entire OTRS instance and the data it contains. The attacker would need to trick an agent into viewing the malicious image, which could be achieved through social engineering or by exploiting other vulnerabilities in the system.
CVE-2020-1766 was publicly disclosed on January 10, 2020. The CVSS score is 2.0 (LOW). No public proof-of-concept exploits have been widely reported, and there is no indication of active exploitation campaigns. It is not listed on the CISA KEV catalog.
Organizations using OTRS for customer support or internal ticketing are at risk. Specifically, deployments running older versions of OTRS (≤7.0.13) are vulnerable. Environments where agents routinely handle uploaded files from external sources are at higher risk.
• otrs: Examine OTRS server logs for unusual file upload patterns, specifically SVG files being processed as JPGs. Look for errors related to image rendering or JavaScript execution.
grep -i 'svg' /var/log/otrs/log.txt |
grep -i 'jpg' • linux / server: Monitor system processes for unusual JavaScript execution originating from the OTRS installation directory. Use lsof to identify processes accessing uploaded files.
lsof /opt/otrs/files/attachments/• generic web: Inspect HTTP response headers for unexpected JavaScript code being injected into the response. Use browser developer tools to examine the DOM for suspicious scripts.
disclosure
Exploit-Status
EPSS
0.77% (73% Perzentil)
CVSS-Vektor
The primary mitigation for CVE-2020-1766 is to upgrade to OTRS version 7.0.14 or later. Prior to upgrading, consider creating a full backup of your OTRS database and configuration files. If an immediate upgrade is not possible, implement strict file upload validation to prevent the upload of SVG files. Configure your web server to block the rendering of SVG files as JPG images. Monitor OTRS logs for suspicious file upload activity. After upgrading, confirm the fix by attempting to upload a known malicious SVG file and verifying that it is not rendered as an inline JPG and does not trigger JavaScript execution.
Aktualisieren Sie OTRS auf die neueste verfügbare Version. Die Versionen 5.0.40, 6.0.25 und 7.0.14 beheben diese Schwachstelle. Weitere Informationen zur Aktualisierung finden Sie in den Versionshinweisen.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2020-1766 is a cross-site scripting (XSS) vulnerability in OTRS versions prior to 7.0.14. It allows an attacker to execute malicious JavaScript by exploiting improper handling of uploaded SVG files.
You are affected if you are running OTRS Community Edition 5.0.x versions prior to 5.0.39, 6.0.x versions prior to 6.0.24, or 7.0.x versions prior to 7.0.14.
Upgrade OTRS to version 7.0.14 or later. Implement strict input validation on uploaded files as an interim measure.
There is no evidence of active exploitation campaigns targeting CVE-2020-1766 at this time.
Refer to the official OTRS security advisory: https://otrs.com/security-advisories/otrs-security-advisory-cve-2020-1766/
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