Is CVE-2017-20202 in the CISA KEV catalog?

No. CVE-2017-20202 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the EPSS score for CVE-2017-20202?

CVE-2017-20202 has an EPSS score of 0.49% (38th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2017-20202?

No published fix for CVE-2017-20202 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2017-20202

UNSCORED

NVD

Description

Web Developer for Chrome v0.4.9 contained malicious code that generated a domain via a DGA and fetched a remote script. The fetched script conditionally loaded follow-on modules that performed extensive ad substitution and malvertising, displayed fake “repair” alerts that redirected users to affiliate programs, and attempted to harvest credentials when users logged in. Injected components enumerate common banner sizes for substitution, replace third-party ad calls, and redirect victim traffic to affiliate landing pages. Potential impacts include user-level code execution in the browser context, large-scale ad fraud and traffic hijacking, credential theft, and exposure to additional payloads delivered by the actor. The compromise was reported on by the maintainer of Web Developer for Chrome on August 2, 2017 and remediated in v0.5.0.

CWE-506

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3.1 Vector

No CVSS vector data available.

Exploit Intelligence

0.49%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% of all known CVEs.

References

Other references6

Embed a live status badge for CVE-2017-20202

Markdown

[![CVE-2017-20202](https://tridentstack.com/cve/badge/CVE-2017-20202.svg)](https://tridentstack.com/cve/CVE-2017-20202)

HTML

<a href="https://tridentstack.com/cve/CVE-2017-20202"><img src="https://tridentstack.com/cve/badge/CVE-2017-20202.svg" alt="CVE-2017-20202"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-14.