What is CVE-2017-20158?

CVE-2017-20158 is a medium-severity cross-site scripting (XSS) vulnerability in vova07/yii2-fileapi-widget (composer), affecting versions < 0.1.9. It is fixed in 0.1.9. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.

How severe is CVE-2017-20158?

CVE-2017-20158 has a CVSS score of 6.1 (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 vova07/yii2-fileapi-widget are affected by CVE-2017-20158?

vova07/yii2-fileapi-widget (composer) versions < 0.1.9 is affected.

Is there a fix for CVE-2017-20158?

Yes. CVE-2017-20158 is fixed in 0.1.9. Upgrade to this version or later.

Is CVE-2017-20158 exploitable, and should I be worried?

Whether CVE-2017-20158 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.

What actually determines whether CVE-2017-20158 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.

CVE-2017-20158 in vova07/yii2-fileapi-widget

Q: How severe is CVE-2017-20158?

CVE-2017-20158 has a CVSS score of 6.1 (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.

Q: Which versions of vova07/yii2-fileapi-widget are affected by CVE-2017-20158?

vova07/yii2-fileapi-widget (composer) versions < 0.1.9 is affected.

Q: Is there a fix for CVE-2017-20158?

Yes. CVE-2017-20158 is fixed in 0.1.9. Upgrade to this version or later.

Q: Is CVE-2017-20158 exploitable, and should I be worried?

Whether CVE-2017-20158 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.

Q: What actually determines whether CVE-2017-20158 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.

Q: How do I fix CVE-2017-20158?

Upgrade vova07/yii2-fileapi-widget to 0.1.9 or later.

Summary

Yii2 FileAPI Widget vulnerable to Cross-site Scripting

A vulnerability was found in vova07 Yii2 FileAPI Widget up to 0.1.8. It has been declared as problematic. Affected by this vulnerability is the function run of the file actions/UploadAction.php. The manipulation of the argument file leads to cross site scripting. The attack can be launched remotely. Upgrading to version 0.1.9 can address this issue. The name of the patch is c00d1e4fc912257fca1fce66d7a163bdbb4c8222. It is recommended to upgrade the affected component. The identifier VDB-217141 was assigned to this vulnerability.

NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

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-2017-20158 has a CVSS score of 6.1 (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 (0.1.9); upgrading removes the vulnerable code path.

Affected versions

vova07/yii2-fileapi-widget (< 0.1.9)

Security releases

vova07/yii2-fileapi-widget → 0.1.9 (composer)

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.

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Remediation advice

Upgrade vova07/yii2-fileapi-widget to 0.1.9 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2017-20158? CVE-2017-20158 is a medium-severity cross-site scripting (XSS) vulnerability in vova07/yii2-fileapi-widget (composer), affecting versions < 0.1.9. It is fixed in 0.1.9. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
How severe is CVE-2017-20158? CVE-2017-20158 has a CVSS score of 6.1 (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 vova07/yii2-fileapi-widget are affected by CVE-2017-20158? vova07/yii2-fileapi-widget (composer) versions < 0.1.9 is affected.
Is there a fix for CVE-2017-20158? Yes. CVE-2017-20158 is fixed in 0.1.9. Upgrade to this version or later.
Is CVE-2017-20158 exploitable, and should I be worried? Whether CVE-2017-20158 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-2017-20158 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-2017-20158? Upgrade vova07/yii2-fileapi-widget to 0.1.9 or later.