Vulnerability · Published Dec 13, 2025 · Assigned by JFROG
CVE-2025-14542Command execution in python-utcp allows attackers to achieve remote code execution when fetching a remote Manual from a malicious endpoint
High 7.5
In plain English
A high-severity security flaw in utcp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 81.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The vulnerability arises when a client fetches a tools’ JSON specification, known as a Manual, from a remote Manual Endpoint. While a provider may initially serve a benign manual (e.g., one defining an HTTP tool call), earning the clients’ trust, a malicious provider can later change the manual to exploit the client.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | utcp | 1.1.0 | GHSA-75mj-4g74-9rg2 |
| PyPI | utcp | 1.1.0 | PYSEC-2026-2000 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| utcp | 0 – before 1.1.0 |
Weakness: CWE-501 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H