CVE-2025-66449: high-severity vulnerability in C4illin ConvertX
ConvertX has Path Traversal that leads to Arbitrary File Write and Arbitrary Code Execution
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.8%
ConvertXis a self-hosted online file converter. In versions prior to 0.16.0, the endpoint `/upload` allows an authenticated user to write arbitrary files on the system, overwriting binaries and allowing code execution. The upload function takes `file.name` directly from user supplied data without doing any sanitization on the name thus allowing for arbitrary file write. This can be used to overwrite system binaries with ones provided from an attacker allowing full code execution. Version 0.16.0 contains a patch for the issue.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
C4illin · ConvertXRelated CVEs — C4illin ConvertX
In the same product, most dangerous first.
CVE-2026-59976HIGHConvertX: Path Traversal vulnerability leading to Arbitrary File WriteEPSS 0.8%CVE-2026-85618HIGHConvertX 0.17.0 Arbitrary File Read via LaTeX Input DirectivesEPSS 0.5%CVE-2026-24741HIGHConvertX Vulnerable to Arbitrary File Deletion via Path Traversal in `POST /delete`EPSS 0.5%CVE-2026-105080CRITICALCVE-2026-105080EPSS 0.4%CVE-2026-108694HIGHConvertX through 0.19.0 Arbitrary File Read via Pandoc ConverterEPSS 0.3%CVE-2026-59977HIGHConvertX: Cross-Site Request Forgery (CSRF) leading to Unauthorized Data DestructionEPSS 0.1%