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Fencer Vulns
high 7.7

CVE-2024-43373 json

webcrack has an Arbitrary File Write Vulnerability on Windows when Parsing and Saving a Malicious Bundle

published 2024-08-14 2 y ago modified 2026-06-17 4 mo ago also GHSA-ccqh-278p-xq6w , EUVD-2024-2557

cvss
7.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

webcrack is a tool for reverse engineering javascript. An arbitrary file write vulnerability exists in the webcrack module when processing specifically crafted malicious code on Windows systems. This vulnerability is triggered when using the unpack bundles feature in conjunction with the saving feature. If a module name includes a path traversal sequence with Windows path separators, an attacker can exploit this to overwrite files on the host system. This vulnerability allows an attacker to write arbitrary `.js` files to the host system, which can be leveraged to hijack legitimate Node.js modules to gain arbitrary code execution. This vulnerability has been patched in version 2.14.1.

Patch / fix

  • npm webcrack 2.14.1
  • j4k0xb webcrack 2.14.1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/j4k0xb/webcrack/security/advisories/GHSA-ccqh-278p-xq6w referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
GitHub 3.1 7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L

Affected packages

ecosystem package affected fixed in
npm webcrack
<2.14.1
2.14.1

Affected products

  • j4k0xb webcrack

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.