What is CVE-2019-16769?

CVE-2019-16769 is a medium-severity vulnerability in Verizon Serialize-Javascript, classified under Cross-site Scripting. CVSS score: 4.2/10. Published 2019-12-05.

How severe is CVE-2019-16769?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Is CVE-2019-16769 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Verizon Serialize-Javascript

CVE-2019-16769

The serialize-javascript npm package before version 2.1.1 is vulnerable to Cross-site Scripting (XSS). It does not properly mitigate against unsafe characters in serialized regular expressions. This vulnerability is not affected on Node.js environment since Node.js's implementation of RegExp.prototype.toString() backslash-escapes all forward slashes in regular expressions. If serialized data of regular expression objects are used in an environment other than Node.js, it is affected by this vulnerability.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.009 (56.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Verizon Serialize-javascript
Yahoo Serialize-javascript — versions < 2.1.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2019-16769?: CVE-2019-16769 is a medium-severity vulnerability in Verizon Serialize-Javascript, classified under Cross-site Scripting. CVSS score: 4.2/10. Published 2019-12-05.
How severe is CVE-2019-16769?: Medium severity. CVSS v3 base score is 4.2 out of 10.
Is CVE-2019-16769 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.