CVE-2025-71388: Stoatchat

High severity, CVSS 7.6. EPSS: 0.5% chance of exploitation in the next 30 days.

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 Stoatchat: from 20241213-1, before 20250210-1 (fixed in 20250210-1)

Published 2026-07-16. Last modified 2026-10-06.