How severe is CVE-2017-20158?

CVE-2017-20158 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2017-20158?

CVE-2017-20158 affects the following packages: vova07/yii2-fileapi-widget (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2017-20158?

Update vova07/yii2-fileapi-widget to 0.1.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-20158 is resolved across your whole dependency graph.

How do I detect CVE-2017-20158 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for vova07/yii2-fileapi-widget. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate CVE-2017-20158 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2017-20158?

O3 pinpoints whether CVE-2017-20158 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is CVE-2017-20158 actively exploited in the wild?

No public exploit code has been indexed for CVE-2017-20158 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2017-20158?

CVE-2017-20158 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 41th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2017-20158?

CVE-2017-20158 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2017-20158 published, and has it been updated?

CVE-2017-20158 was published on December 31, 2022 and was last updated on March 15, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2017-20158: Yii2 FileAPI Widget vulnerable to Cross-site Sc…

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk41th percentile+0.17%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

1 pkg affected

🐘vova07/yii2-fileapi-widget

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

** UNSUPPORTED WHEN ASSIGNED ** 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 is able to address this issue. The identifier 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.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`vova07/yii2-fileapi-widget`	all versions	0.1.9

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for vova07/yii2-fileapi-widget. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update vova07/yii2-fileapi-widget to 0.1.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2017-20158 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2017-20158 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2017-20158. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

** UNSUPPORTED WHEN ASSIGNED ** 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 is able to address this issue. The identifier of the patch is c00d1e4fc912257fca1fce66d7a163bdbb4c8222. It is recommended to upgrade the affected component. The identifier VDB-217141 was assigned to this vulnerability. NOTE: This vulnerabil

O3 Security · Impact-Aware SCA

Is CVE-2017-20158 in your dependencies?

O3 detects CVE-2017-20158 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works

CVE-2017-20158