Loss of Control in WebAssembly Wabt Product by WebAssembly
CVE-2025-6273

4.8MEDIUM

Key Information:

Vendor

Webassembly

Status
Wabt
Vendor
CVE Published:
19 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6273?

A vulnerability has been identified in the WebAssembly wabt tool, specifically within the LogOpcode function of the src/binary-reader-objdump.cc file. This issue can be exploited through local access, resulting in a reachable assertion. Although the exploit has been made public, the actual existence and impact of this vulnerability in real-world WebAssembly programs remain uncertain. The maintenance team has noted that it may not significantly affect practical applications of WebAssembly.

Affected Version(s)

wabt 1.0.0

wabt 1.0.1

wabt 1.0.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6273 - Proof of Concept

References

https://vuldb.com/?id.313277
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313277
signaturepermissions-required
https://vuldb.com/?submit.593010
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

JJLeo (VulDB User)
.
CVE-2025-6273 : Loss of Control in WebAssembly Wabt Product by WebAssembly