CVE-2023-48313 is a medium-severity cross-site scripting (XSS) vulnerability in Umbraco.CMS (nuget), affecting versions >= 10.0.0, < 10.8.1. It is fixed in 10.8.1, 12.3.4.
Impact Cross-site scripting (XSS) enable attackers to bring malicious content into a website or application. Explanation of the vulnerability A DOM-XSS can be exploited when users are successfully logging into the Backoffice.
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
CVE-2023-48313 has a CVSS score of 4.3 (Medium). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (10.8.1, 12.3.4). Upgrading removes the vulnerable code path.
nuget
Umbraco.CMS (>= 10.0.0, < 10.8.1)Umbraco.CMS (>= 11.0.0, < 12.3.4)Umbraco.CMS → 10.8.1 (nuget)Umbraco.CMS → 12.3.4 (nuget)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2023-48313 is reachable in your applications. Explore open-source security for your team.
See if CVE-2023-48313 is reachable in your applications. Get a demo
Upgrade the following packages to resolve this vulnerability:
Umbraco.CMS to 10.8.1 or laterUmbraco.CMS to 12.3.4 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2023-48313 is a medium-severity cross-site scripting (XSS) vulnerability in Umbraco.CMS (nuget), affecting versions >= 10.0.0, < 10.8.1. It is fixed in 10.8.1, 12.3.4. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
CVE-2023-48313 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Umbraco.CMS (nuget) versions >= 10.0.0, < 10.8.1 is affected.
Yes. CVE-2023-48313 is fixed in 10.8.1, 12.3.4. Upgrade to this version or later.
Whether CVE-2023-48313 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
Umbraco.CMS to 10.8.1 or laterUmbraco.CMS to 12.3.4 or later