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Vulnerabilities

Vulnerability · CVE-2018-6341

React applications which rendered to HTML using the ReactDOMServer API were not escaping user-supplied attribute names at render-time.

Published Dec 31, 2018 · catalog updated Jun 17, 2026 · React applications which rendered

Last checked Nov 8, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2018-6341. EPSS is 3.43%. Act only if a listed version of React applications which rendered is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (React applications which rendered).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.43%
Remediation
Version ranges on file
Affected products
cpe facebook/react

React applications which rendered to HTML using the ReactDOMServer API were not escaping user-supplied attribute names at render-time. That lack of escaping could lead to a cross-site scripting vulnerability. This issue affected minor releases 16.0.x, 16.1.x, 16.2.x, 16.3.x, and 16.4.x. It was fixed in 16.0.1, 16.1.2, 16.2.1, 16.3.3, and 16.4.2.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe facebook/react< 16.0.1
  • cpe facebook/react< 16.1.2
  • cpe facebook/react< 16.2.1
  • cpe facebook/react< 16.3.3
  • cpe facebook/react< 16.4.2

How to fix CVE-2018-6341

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2018-6341. EPSS is 3.43%. Act only if a listed version of React applications which rendered is installed.

Which versions are affected?

Compare what you have installed with < 16.0.1, < 16.1.2, < 16.2.1, < 16.3.3, < 16.4.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 3.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

React security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 31, 2018 · Monitored products — high

    Detected

    React applications which rendered to HTML using the ReactDOMServer API were not escaping user-supplied attribute names at render-time. That lack of escaping could lead to a cross-site scripting vulnerability. This issue affected minor releases 16.0.x, 16.1.x, 16.2.x, 16.3.x, and 16.4.x. It was fixed in 16.0.1, 16.1.2, 16.2.1, 16.3.3, and 16.4.2.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    React applications which rendered to HTML using the ReactDOMServer API were not escaping user-supplied attribute names at render-time. That lack of escaping could lead to a cross-site scripting vulnerability. This issue affected minor releases 16.0.x, 16.1.x, 16.2.x, 16.3.x, and 16.4.x. It was fixed in 16.0.1, 16.1.2, 16.2.1, 16.3.3, and 16.4.2.

Sources

  • CVE.orgVulnerability recordCVE-2018-6341

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2018-6341

    React applications which rendered to HTML using the ReactDOMServer API were not escaping user-supplied attribute names at render-time. That lack of escaping could lead to a cross-site scripting vulnerability. This issue affected minor releases 16.0.x, 16.1.x, 16.2.x, 16.3.x, and 16.4.x. It was fixed in 16.0.1, 16.1.2, 16.2.1, 16.3.3, and 16.4.2.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 8, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 8, 2026
  • Monitored products — highNov 8, 2026