CVE-2024-28866: GoCD is a continuous delivery server. GoCD versions from 19.4.0 to 23.5.0 (inclusive) are potentially vulnerable to a reflected cross-site scripting v...

Description

GoCD is a continuous delivery server. GoCD versions from 19.4.0 to 23.5.0 (inclusive) are potentially vulnerable to a reflected cross-site scripting vulnerability on the loading page displayed while GoCD is starting, via abuse of a `redirect_to` query parameter with inadequate validation. Attackers could theoretically abuse the query parameter to steal session tokens or other values from the user's browser. In practice exploiting this to perform privileged actions is likely rather difficult to exploit because the target user would need to be triggered to open an attacker-crafted link in the period where the server is starting up (but not completely started), requiring chaining with a separate denial-of-service vulnerability. Additionally, GoCD server restarts invalidate earlier session tokens (i.e GoCD does not support persistent sessions), so a stolen session token would be unusable once the server has completed restart, and executed XSS would be done within a logged-out context. The issue is fixed in GoCD 24.1.0. As a workaround, it is technically possible in earlier GoCD versions to override the loading page with an earlier version which is not vulnerable, by starting GoCD with the Java system property override as either `-Dloading.page.resource.path=/loading_pages/default.loading.page.html` (simpler early version of loading page without GoCD introduction) or `-Dloading.page.resource.path=/does_not_exist.html` (to display a simple message with no interactivity).

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.42%

33.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Thoughtworks	Gocd	>= 19.4.0, < 24.1.0

References

https://github.com/gocd/gocd/commit/388d8893ec4cac51d2b76e923cc9b55c7703e402Patch
https://github.com/gocd/gocd/releases/tag/24.1.0Release Notes
https://github.com/gocd/gocd/security/advisories/GHSA-q882-q6mm-mgvhVendor Advisory
https://www.gocd.org/releases/#24-1-0Release Notes
https://github.com/gocd/gocd/commit/388d8893ec4cac51d2b76e923cc9b55c7703e402Patch
https://github.com/gocd/gocd/releases/tag/24.1.0Release Notes
https://github.com/gocd/gocd/security/advisories/GHSA-q882-q6mm-mgvhVendor Advisory
https://www.gocd.org/releases/#24-1-0Release Notes

Timeline

Published: May 14, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-28866?

GoCD is a continuous delivery server. GoCD versions from 19.4.0 to 23.5.0 (inclusive) are potentially vulnerable to a reflected cross-site scripting vulnerability on the loading page displayed while GoCD is starting, via abuse of a `redirect_to` query parameter with inadequate validation. Attackers could theoretically abuse the query parameter to steal session tokens or other values from the user's browser. In practice exploiting this to perform privileged actions is likely rather difficult to exploit because the target user would need to be triggered to open an attacker-crafted link in the period where the server is starting up (but not completely started), requiring chaining with a separate denial-of-service vulnerability. Additionally, GoCD server restarts invalidate earlier session tokens (i.e GoCD does not support persistent sessions), so a stolen session token would be unusable once the server has completed restart, and executed XSS would be done within a logged-out context. The issue is fixed in GoCD 24.1.0. As a workaround, it is technically possible in earlier GoCD versions to override the loading page with an earlier version which is not vulnerable, by starting GoCD with the Java system property override as either `-Dloading.page.resource.path=/loading_pages/default.loading.page.html` (simpler early version of loading page without GoCD introduction) or `-Dloading.page.resource.path=/does_not_exist.html` (to display a simple message with no interactivity).

How severe is CVE-2024-28866?

CVE-2024-28866 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2024-28866?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.