Summary
Smarty Cross-site Scripting vulnerability in pages that use smartyfunctionmailto
In Smarty before 3.1.47 and 4.x before 4.2.1, libs/plugins/function.mailto.php allows cross-site scripting. A web page that uses smarty_function_mailto, and that could be parameterized using GET or POST input parameters, could allow injection of JavaScript code by a user.
Impact
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-2018-25047 has a CVSS score of 5.4 (Medium). The vector is network-reachable, low 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 (3.1.47, 4.2.1); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
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. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Already deployed Kodem?
See it in your environmentNew to Kodem? Get a demo →Remediation advice
smarty/smarty to 3.1.47 or later; smarty/smarty to 4.2.1 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is CVE-2018-25047? CVE-2018-25047 is a medium-severity cross-site scripting (XSS) vulnerability in smarty/smarty (composer), affecting versions < 3.1.47. It is fixed in 3.1.47, 4.2.1. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
- How severe is CVE-2018-25047? CVE-2018-25047 has a CVSS score of 5.4 (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.
- Which versions of smarty/smarty are affected by CVE-2018-25047? smarty/smarty (composer) versions < 3.1.47 is affected.
- Is there a fix for CVE-2018-25047? Yes. CVE-2018-25047 is fixed in 3.1.47, 4.2.1. Upgrade to this version or later.
- Is CVE-2018-25047 exploitable, and should I be worried? Whether CVE-2018-25047 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
- What actually determines whether CVE-2018-25047 is exploitable, and how bad it is? 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.
- How do I fix CVE-2018-25047?
- Upgrade
smarty/smartyto 3.1.47 or later - Upgrade
smarty/smartyto 4.2.1 or later
- Upgrade