GHSA-mj2c-8hxf-ffvq
MEDIUMCocotais Bot has builtin .echo command injection
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
cocotais-botReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.
Description
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
- Set up a chatbot using the affected framework.
- Join the chat that includes the bot as a regular user with no permission to use @全体成员.
- Send the following message in the chat:
/echo <qqbot-at-everyone />
- The bot will respond by repeating the message, and the platform will interpret
<qqbot-at-everyone />as an @全体成员 mention. - All the chat members receive a notification, despite the user lacking that permission.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | cocotais-bot | ≥ 1.5.0-test2-hotfix&&< 1.6.2 | 1.6.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cocotais-bot. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update cocotais-bot to 1.6.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mj2c-8hxf-ffvq is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-mj2c-8hxf-ffvq is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-mj2c-8hxf-ffvq. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-mj2c-8hxf-ffvq in your dependencies?
O3 detects GHSA-mj2c-8hxf-ffvq across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.