CVE-2023-0957Public exploitNetwork attack vector

Workspace takeover via unrestricted WebSocket origins

Published Mar 3, 2023 · Updated Mar 5, 2025

Cross-site WebSocket hijacking in Gitpod Classic before 2022.11.2 allows remote attackers to take over workspaces through a victim's browser. The server's /api/gitpod WebSocket endpoint accepts credentialed workspace-subdomain origins, then exposes authenticated JSON-RPC methods. Exploitation requires a signed-in victim to visit attacker-controlled workspace content, enabling data theft and SSH-key addition.

CVSS severity8.2
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site WebSocket hijacking in Gitpod Classic before 2022.11.2 allows remote attackers to take over workspaces through a victim's browser. The server's /api/gitpod WebSocket endpoint accepts credentialed workspace-subdomain origins, then exposes authenticated JSON-RPC methods. Exploitation requires a signed-in victim to visit attacker-controlled workspace content, enabling data theft and SSH-key addition.

The record

CVE
CVE-2023-0957
Published
Mar 3, 2023
Updated
Mar 5, 2025
Vendor
Gitpod
Product
Gitpod Classic
Classifications
CWE-1385, CWE-346, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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=0 <2022.11.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gitpod · Gitpod Classicversion=0 <2022.11.2

Published CVSS scores

9.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
8.2Snyk CNACVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1385Missing Origin Validation in WebSockets
CWE-346Origin Validation Error
T1189Drive-by Compromise

Public exploit references

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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