CVE-2015-8857

Name: CVE-2015-8857
Creator: NVD / NIST
Published: 2017-01-23T21:59:00.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.56%

Last modified Jun 17, 2026

CVE-2015-8857 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The uglify-js package before 2.4.24 for Node.js does not properly account for non-boolean values when rewriting boolean expressions, which might allow attackers to bypass security mechanisms or possibly have unspecified other impact by leveraging improperly rewritten Javascript.. EPSS estimates a 3.56% chance of exploitation in the next 30 days.

Description

The uglify-js package before 2.4.24 for Node.js does not properly account for non-boolean values when rewriting boolean expressions, which might allow attackers to bypass security mechanisms or possibly have unspecified other impact by leveraging improperly rewritten Javascript.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.56%

87.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-254

Affected Software

Vendor	Product	Versions
Uglifyjs Project	Uglifyjs	< 2.4.24

References

http://www.openwall.com/lists/oss-security/2016/04/20/11Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/96410Third Party Advisory, VDB Entry
https://nodesecurity.io/advisories/39Exploit, Patch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/04/20/11Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/96410Third Party Advisory, VDB Entry
https://nodesecurity.io/advisories/39Exploit, Patch, Vendor Advisory

Timeline

Published: Jan 23, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-8857?

How severe is CVE-2015-8857?

CVE-2015-8857 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.56% probability of exploitation in the next 30 days.

How do I fix CVE-2015-8857?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-8857?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST