CVE-2025-2021: Ashlar-Vellum Cobalt XE File Parsing Integer Overflow Remote Code Execution Vulnerability
Description
Ashlar-Vellum Cobalt XE File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of XE files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25264.
Classification
CVE ID: CVE-2025-2021
CVSS Base Severity: HIGH
CVSS Base Score: 7.8
CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Problem Types
CWE-190: Integer Overflow or WraparoundAffected Products
Vendor: Ashlar-Vellum
Product: Cobalt
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.04% (probability of being exploited)
EPSS Percentile: 10.31% (scored less or equal to compared to others)
EPSS Date: 2025-04-09 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-2021https://www.zerodayinitiative.com/advisories/ZDI-25-125/