Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2015-8857

31
FAUCET Score

CVE-2015-8857 describes a critical vulnerability in the uglify-js package prior to version 2.4.24 for Node.js, where improper handling of non-boolean values during boolean expression rewriting could allow attackers to bypass security mechanisms. With a CVSS score of 9.8 (Critical), this vulnerability has a network attack vector, low attack complexity, and high impacts on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or inclusion in the KEV catalog, though it has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.4.24CPE matchmatch criteria
cpe:2.3:a:uglifyjs_project:uglifyjs:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.56%
Probability of exploitation in next 30 days
EPSS Percentile
88.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0356 is in the 80th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

npmpatch availablevia ghsa
Product: uglify-jsFixed in: 2.4.24
rubygemspatch availablevia ghsa
Product: uglifierFixed in: 2.7.2

Vendor Advisories (1)

npmGHSA-34r7-q49f-h37ccritical

Incorrect Handling of Non-Boolean Comparisons During Minification in uglify-js

Oct 24, 2017

References

nodesecurity.io / advisories/39
ExploitPatchVendor Advisory
openwall.com / lists/oss-security/2016/04/20/11
Mailing ListThird Party Advisory
securityfocus.com / bid/96410
Third Party AdvisoryVDB Entry