CVE-2024-21583Network attack vector

Victim action hijacking via cookie tossing

Published Jul 19, 2024 · Updated Oct 31, 2024

Cookie tossing in Gitpod Classic before main-gha.27122 allows remote authenticated users to bind victim actions to an attacker session. CookieNameFromDomain generated a domain-scoped gitpod_io_jwt2 cookie without the __Host- prefix, allowing a controlled subdomain to overwrite it. Exploitation requires subdomain control and victim interaction, causing selected victim operations, such as connecting a GitHub organization, to execute in the attacker's session.

CVSS severity5.1
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cookie tossing in Gitpod Classic before main-gha.27122 allows remote authenticated users to bind victim actions to an attacker session. CookieNameFromDomain generated a domain-scoped gitpod_io_jwt2 cookie without the __Host- prefix, allowing a controlled subdomain to overwrite it. Exploitation requires subdomain control and victim interaction, causing selected victim operations, such as connecting a GitHub organization, to execute in the attacker's session.

The record

CVE
CVE-2024-21583
Published
Jul 19, 2024
Updated
Oct 31, 2024
Vendor
Gitpod
Product
Gitpod Classic
Classifications
CWE-565, CWE-15, T1185
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 31, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <0.1.5-main-gha.27122
  2. Affected versionversion=0 <main-gha.27122

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Gitpod · Gitpod Classicversion=0 <0.1.5-main-gha.27122; version=0 <main-gha.27122

Published CVSS scores

4.1SnykCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
5.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/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-565Reliance on Cookies without Validation and Integrity Checking
CWE-15External Control of System or Configuration Setting
T1185Browser Session Hijacking

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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