CVE-2026-25741

Zulip is an open-source team collaboration tool. Prior to commit bf28c82dc9b1f630fa8e9106358771b20a0040f7, the API endpoint for creating a card update session during an upgrade flow was accessible to users with only organization member privileges. When the associated Stripe Checkout session is completed, the Stripe webhook updates the organization’s default payment method. Because no billing-specific authorization check is enforced, a regular (non-billing) member can change the organization’s payment method. This vulnerability affected the Zulip Cloud payment processing system, and has been patched as of commit bf28c82dc9b1f630fa8e9106358771b20a0040f7. Self-hosted deploys are no longer affected and no patch or upgrade is required for them.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/zulip/zulip/commit/bf28c82dc9b1f630fa8e9106358771b20a0040f7
https://github.com/zulip/zulip/security/advisories/GHSA-vhhx-84f7-rc8j

Configurations

No configuration.

History

No history.

Information

Published : 2026-02-26 22:20

Updated : 2026-02-27 14:06

NVD link : CVE-2026-25741

Mitre link : CVE-2026-25741

CVE.ORG link : CVE-2026-25741

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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