CVE-2023-0957

CRITICALNVD 8.29.6▲
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2023-07-06. NVD baseline CVSS 8.2; sources differ by 1.4.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in Gitpod versions prior to release-2022.11.2.16. There is a Cross-Site WebSocket Hijacking (CSWSH) vulnerability that allows attackers to make WebSocket connections to the Gitpod JSONRPC server using a victim’s credentials, because the Origin header is not restricted. This can lead to the extraction of data from workspaces, to a full takeover of the workspace.

CVSS v3
8.2
EG Score
9.6CRITICALmedium confidence
EG Risk
43
EG Risk 43/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity96% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
33rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

March 3, 2023

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Sep 8, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release, github_commit.
github_commit

commit 673ab6856fa0 (gitpod-io/gitpod)

Fix landed in gitpod-io/gitpod commit 673ab6856fa0 — awaiting tagged release

https://github.com/gitpod-io/gitpod/commit/673ab6856fa04c13b7b1f2a968e4d090f1d94e4f
github_commit

commit 12956988eec0 (gitpod-io/gitpod)

Fix landed in gitpod-io/gitpod commit 12956988eec0 — awaiting tagged release

https://github.com/gitpod-io/gitpod/commit/12956988eec0031f42ffdfa3bdc3359f65628f9f
generic🟡 PoC Available

Gitpod remote code execution 0-day vulnerability via WebSockets | Snyk Labs

https://snyk.io/blog/gitpod-remote-code-execution-vulnerability-websockets/
github_release Patch Available

2022.11.2

Patch available: gitpod-io/gitpod release-2022.11.2

https://github.com/gitpod-io/gitpod/releases/tag/release-2022.11.2
github_pr

[public-api-server] Forward Origin header where provided

Fix merged in gitpod-io/gitpod PR #16405 on 2023-02-15 — awaiting tagged release

https://github.com/gitpod-io/gitpod/pull/16405
github_pr

[server] strict same site origin for /api/gitpod endpoint

Fix merged in gitpod-io/gitpod PR #16378 on 2023-02-14 — awaiting tagged release

https://github.com/gitpod-io/gitpod/pull/16378

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 175 total refreshes for this CVE.

  1. 2026-10-09 20:05 UTCEPSS rescore
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  3. 2026-10-07 23:45 UTCEPSS rescore
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  8. 2026-09-30 16:14 UTCEG score recompute
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  1. 2026-09-05 15:25 UTCEPSS rescore
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  47. 2026-07-23 02:17 UTCEG score recompute
  48. 2026-07-22 23:05 UTCEG score recompute
  49. 2026-07-22 14:06 UTCEPSS rescore
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  51. 2026-07-21 15:23 UTCEPSS rescore
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  75. 2026-07-07 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-0957?
CVE-2023-0957 is a critical vulnerability published on March 3, 2023. An issue was discovered in Gitpod versions prior to release-2022.11.2.16. There is a Cross-Site WebSocket Hijacking (CSWSH) vulnerability that allows attackers to make WebSocket connections to the Gitpod JSONRPC server using a victim’s credentials, because the Origin header is not restricted. This…
When was CVE-2023-0957 disclosed?
CVE-2023-0957 was first published on March 3, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-0957 actively exploited?
CVE-2023-0957 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-0957?
CVE-2023-0957 has a CVSS v3 base score of 8.2 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.6 (CRITICAL).
How do I remediate CVE-2023-0957?
A fix for CVE-2023-0957 is available: update to the fixed version the vendor names in its advisory.

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