CVE-2025-6705: eclipse foundation eclipse open vsx registry

Vulnerability summary

CVE-2025-6705 is a high (CVSS 7.6) vulnerability in eclipse foundation eclipse open vsx registry. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16.8% of scored vulnerabilities.

Timeline

1. 27-06-2025
   PublishedVulnerability first disclosed.
2. 02-07-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability in the Eclipse Open VSX Registry’s automated publishing system could have allowed unauthorized uploads of extensions. Specifically, the system’s build scripts were executed without proper isolation, potentially exposing a privileged token. This token enabled the publishing of new extension versions under any namespace, including those not controlled by an attacker. However, it did not permit deletion of existing extensions, overwriting of published versions, or access to administrative features of the registry. The issue was reported on May 4, 2025, fully resolved by June 24, and followed by a comprehensive audit. No evidence of compromise was found, though 81 extensions were proactively deactivated as a precaution. The standard publishing process remained unaffected. Recommendations have been issued to mitigate similar risks in the future.

• CWE-653Improper Isolation or CompartmentalizationThe product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions.
• CWE-913Improper Control of Dynamically-Managed Code ResourcesThe product does not properly restrict reading from or writing to dynamically-managed code resources such as variables, objects, classes, attributes, functions, or executable instructions or statements.