Vulnerability · Published Jul 16, 2026 · Assigned by VulnCheck

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

High 7.6

In plain English

A high-severity authorization bypass via user-controlled key in stoatchat from stoatchat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 4.0)7.6High

Exploit odds (30 days)0.5%top 58.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
stoatchat	stoatchat	20241213-1 – before 20250210-1

Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

GitHub Security Advisory (GHSA-8684-rvfj-v3jq) vendor-advisory
https://github.com/stoatchat/stoatchat/commit/e3723d647effb81ea3d3919d848faf64dbe89829 patch
VulnCheck Advisory: stoatchat 20241213-1 Webhook Token Disclosure via Read Permissions third-party-advisory