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.
An attacker could exploit this vulnerability by crafting a malicious SVG file disguised as a JPG image. When an OTRS agent attempts to view or process this file, the system incorrectly renders it as an inline JPG, triggering the embedded JavaScript code. This could lead to various malicious actions, including session hijacking, redirection to phishing sites, or defacement of the OTRS interface. The impact is primarily limited to the agent's browser session, but a successful attack could compromise sensitive information or allow the attacker to impersonate the agent within the OTRS system. The low CVSS score reflects the difficulty of exploitation and limited scope of impact.
CVE-2020-1766 was publicly disclosed on January 10, 2020. There is no evidence of active exploitation campaigns targeting this vulnerability. No public proof-of-concept (PoC) code has been widely released. The vulnerability is not listed on the CISA KEV catalog. The low CVSS score suggests a relatively low probability of exploitation in the wild.
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
漏洞利用状态
EPSS
0.77% (73% 百分位)
CVSS 向量
The primary mitigation for CVE-2020-1766 is to upgrade OTRS to version 7.0.14 or later. If an immediate upgrade is not feasible, consider implementing strict input validation on uploaded files to prevent the processing of SVG files when JPGs are expected. Web Application Firewalls (WAFs) configured to detect and block malicious JavaScript payloads can also provide a layer of defense. Regularly review OTRS configurations and ensure that image processing settings are secure. After upgrading, confirm the fix by attempting to upload a test SVG file and verifying that it is handled correctly and does not trigger JavaScript execution.
升级OTRS到最新可用版本。版本 5.0.40、6.0.25 和 7.0.14 修复了此漏洞。请参阅版本说明以获取有关升级的更多详细信息。
漏洞分析和关键警报直接发送到您的邮箱。
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/