5.3
MEDIUM
CVE-2025-6705
Microsoft Azure DevOps Open-VSX Unauthorized Build Script Execution Vulnerability
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.

INFO

Published Date :

June 27, 2025, 3:15 p.m.

Last Modified :

July 31, 2025, 4:12 p.m.

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2025-6705 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Eclipse open_vsx
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-6705.

URL Resource
https://github.com/EclipseFdn/publish-extensions/pull/881 Issue Tracking
https://open-vsx.org Product

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-6705 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2025-6705 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jul. 31, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    Added CPE Configuration OR *cpe:2.3:a:eclipse:open_vsx:-:*:*:*:*:*:*:*
    Added Reference Type Eclipse Foundation: https://github.com/EclipseFdn/publish-extensions/pull/881 Types: Issue Tracking
    Added Reference Type Eclipse Foundation: https://open-vsx.org Types: Product
  • CVE Modified by [email protected]

    Jul. 02, 2025

    Action Type Old Value New Value
    Changed Description On open-vsx.org https://open-vsx.org/  it was possible to run an arbitrary build scripts for auto-published extensions because of missing sandboxing of CI job runs. An attacker who had access to an existing extension could take over the service account of the marketplace. The issue has been fixed on June 24th, 2025 and the vulnerable code present in the publish-extension code repository. 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.
  • CVE Modified by [email protected]

    Jun. 27, 2025

    Action Type Old Value New Value
    Changed Description On open-vsx.org http://open-vsx.org/  it was possible to run an arbitrary build scripts for auto-published extensions because of missing sandboxing of CI job runs. An attacker who had access to an existing extension could take over the service account of the marketplace. The issue has been fixed on June 24th, 2025 and the vulnerable code present in the publish-extension code repository. On open-vsx.org https://open-vsx.org/  it was possible to run an arbitrary build scripts for auto-published extensions because of missing sandboxing of CI job runs. An attacker who had access to an existing extension could take over the service account of the marketplace. The issue has been fixed on June 24th, 2025 and the vulnerable code present in the publish-extension code repository.
  • New CVE Received by [email protected]

    Jun. 27, 2025

    Action Type Old Value New Value
    Added Description On open-vsx.org http://open-vsx.org/  it was possible to run an arbitrary build scripts for auto-published extensions because of missing sandboxing of CI job runs. An attacker who had access to an existing extension could take over the service account of the marketplace. The issue has been fixed on June 24th, 2025 and the vulnerable code present in the publish-extension code repository.
    Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-913
    Added CWE CWE-653
    Added Reference https://github.com/EclipseFdn/publish-extensions/pull/881
    Added Reference https://open-vsx.org
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-6705 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-6705 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability