CVE-2026-73084

Activepieces: Reflected Cross-Site Scripting in OAuth Redirect Endpoint

State: Published
Severity: 6.1 Medium
Published: Aug 11, 2026
Updated: Aug 12, 2026
Reserved: Aug 10, 2026

Description

Activepieces is an open source AI workflow automation platform. Prior to 0.83.0, the /api/redirect OAuth callback endpoint embeds the user-supplied code query parameter directly into an inline script block without proper escaping. A crafted request to /api/redirect with a malicious code value can break out of the script context and execute arbitrary JavaScript in the Activepieces origin when a logged-in user opens it. An unauthenticated attacker can access the victim's session tokens or make authenticated API calls on the victim's behalf. This issue is fixed in version 0.83.0.

Scores

CVSS	Score	Vector	Source
3.1	6.1 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94 Improper Control of Generation of Code ('Code Injection')

Affected Products

Product	Versions
activepiecesactivepieces	< 0.83.0Affected

References

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