CVE-2025-6705Network attack vector

Unauthorized extension publishing via unsandboxed build scripts

Published Jun 27, 2025 · Updated Jul 2, 2025

Improper isolation in Eclipse Open VSX Registry before June 24, 2025 allows remote authenticated users to publish extension versions. The auto-publishing workflow ran extension-controlled build scripts without sandboxing, allowing those scripts to read its privileged registry token. Exploitation requires control of an accepted auto-published extension or later malicious code in a manually approved addition; the token creates new versions but cannot overwrite or delete existing releases.

CVSS severity7.6
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper isolation in Eclipse Open VSX Registry before June 24, 2025 allows remote authenticated users to publish extension versions. The auto-publishing workflow ran extension-controlled build scripts without sandboxing, allowing those scripts to read its privileged registry token. Exploitation requires control of an accepted auto-published extension or later malicious code in a manually approved addition; the token creates new versions but cannot overwrite or delete existing releases.

The record

CVE
CVE-2025-6705
Published
Jun 27, 2025
Updated
Jul 2, 2025
Vendor
The Eclipse Foundation
Product
Open VSX Registry
Classifications
CWE-653, CWE-913, T1195.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=date < 20250624

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Eclipse Foundation · Open VSX Registryversion=date < 20250624

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
7.6Eclipse FoundationCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-653Improper Isolation or Compartmentalization
CWE-913Improper Control of Dynamically-Managed Code Resources
T1195.002Compromise Software Supply Chain

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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