GHSA-mj2c-8hxf-ffvq

Suggest an improvement
Source
https://github.com/advisories/GHSA-mj2c-8hxf-ffvq
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-mj2c-8hxf-ffvq/GHSA-mj2c-8hxf-ffvq.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-mj2c-8hxf-ffvq
Aliases
Published
2025-05-19T16:25:05Z
Modified
2025-05-19T16:42:21Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
Cocotais Bot has builtin .echo command injection
Details

Summary

 A command echoing feature in the framework allows users to indirectly trigger privileged behavior by injecting special platform tags. Specifically, an unauthorized user can use the /echo <qqbot-at-everyone /> command to cause the bot to send a message that mentions all members in the chat, bypassing any permission controls. This can lead to spam, disruption, or abuse of notification systems. 

Details

 The framework provides a command /echo that causes the bot to repeat any user-provided message verbatim in the group chat. However, the bot fails to sanitize or filter platform-specific control elements such as <qqbot-at-everyone />, which, when included in a message, mentions everyone (i.e., @全体成员). While normal users are forbidden from using this tag in normal chats, the bot, which has higher privileges, is allowed to do so.  Since the /echo command blindly echoes any content, a user can exploit this by sending: 

/echo <qqbot-at-everyone />

 The bot will then send a message containing <qqbot-at-everyone />, causing the platform to interpret it as an @全体成员 command, effectively allowing an unauthorized user to @everyone via the bot. 

PoC



  1. Set up a chatbot using the affected framework.
  2. Join the chat that includes the bot as a regular user with no permission to use @全体成员.
  3. Send the following message in the chat: 
/echo <qqbot-at-everyone />
  1. The bot will respond by repeating the message, and the platform will interpret <qqbot-at-everyone /> as an @全体成员 mention.
  2. All the chat members receive a notification, despite the user lacking that permission.  
Database specific 
{
    "cwe_ids":  [
        "CWE-74"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2025-05-19T16:25:05Z",
    "nvd_published_at":  "2025-05-17T19:15:46Z",
    "severity":  "MODERATE"
}
References

Affected packages

npm / cocotais-bot

Package

Name
cocotais-bot
View open source insights on deps.dev
Purl
pkg:npm/cocotais-bot

Affected ranges

Type
SEMVER
Events
Introduced
1.5.0-test2-hotfix
Fixed
1.6.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-mj2c-8hxf-ffvq/GHSA-mj2c-8hxf-ffvq.json"