What’s Vulnerable › Vulnerabilities

CVE-2025-71388: stoatchat 20241213-1 Webhook Token Disclosure via Read Permissions

• Severity: high (CVSS 7.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-16 · updated 2026-10-06
• Weakness: CWE-639

Description

stoatchat (delta/Revolt) versions from 20241213-1 before 20250210-1 allow users with only ViewChannel (read) permission on a channel to fetch that channel's webhooks, including their tokens, because the webhook fetch endpoint checked for ViewChannel instead of ManageWebhooks. Using a retrieved token, an attacker can send arbitrary messages to the channel, bypassing channel permissions and impersonating a bot or webhook. Fixed in 20250210-1 (0.8.2).

Affected products

• stoatchat: from 20241213-1 before 20250210-1 — fixed in 20250210-1

How to fix

Upgrade to a fixed version: stoatchat 20250210-1. Check the vendor advisory for mitigations.

References

• https://github.com/stoatchat/stoatchat/commit/e3723d647effb81ea3d3919d848faf64dbe89829
• https://github.com/stoatchat/stoatchat/security/advisories/GHSA-8684-rvfj-v3jq
• https://www.vulncheck.com/advisories/stoatchat-20241213-1-webhook-token-disclosure-via-read-permissions

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