Remote Code Execution Vulnerability in Ashlar-Vellum Cobalt File Parsing
CVE-2025-8003

7.8HIGH

Key Information:

Vendor

Ashlar-vellum

Status
Cobalt
Vendor
CVE Published:
17 September 2025

What is CVE-2025-8003?

A remote code execution vulnerability exists within the parsing of CO files in Ashlar-Vellum Cobalt. The flaw is due to insufficient validation of user-supplied data, allowing an attacker to read past the end of an allocated data structure. To exploit this vulnerability, an attacker must coerce a user into visiting a malicious webpage or opening a malicious CO file, leading to potential arbitrary code execution in the context of the affected application.

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Affected Version(s)

Cobalt 12 SP1

References

https://www.zerodayinitiative.com/advisories/ZDI-25-720/
x_research-advisory

CVSS V3.0

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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