T09 · Insecure Skill Coding Practices
- Location
scripts/youtube-monitor.py:25- Finding
Hardcoded Telegram Bot Token Exposes Bot API Access
- Content
View full analysis
Vulnerability Details
File Location:
scripts/youtube-monitor.py, lines 25–28
Vulnerability Type: Hardcoded secret
Risk Level: HighVulnerable Code
python token = "8630160870:AAFFF8xPS0muOqg8LGgMI3HalEA7ubVRIF8" url = f"https://api.telegram.org/bot{token}/sendMessage" data = { "chat_id": TELEGRAM_CHANNEL, "text": message, "parse_mode": "Markdown" }Technical Analysis
A Telegram bot token is embedded directly in the distributed source code. This token functions as a bearer credential: possession of it is generally sufficient to authenticate requests to the Telegram Bot API without any additional proof of identity.
Anyone able to read the Skill package, source repository, archive, logs containing the source, or a deployed copy can extract and reuse the credential outside the intended monitoring workflow. Embedding the token also prevents effective separation between application code and deployment-specific secrets.
The network transmission to Telegram is part of the declared notification functionality. The vulnerability is not the use of the Telegram API itself, but the permanent disclosure of its authentication credential in source code.
Attack Path
- An attacker obtains a copy of the Skill package or reads
scripts/youtube-monitor.py. - The attacker extracts the hardcoded bot token.
- The attacker submits authenticated requests directly to
https://api.telegram.org/bot<token>/.... - The attacker invokes API operations available to the bot, independently of the Skill.
- If the bot has channel administration or posting permissions, the attacker abuses those permissions until the token is revoked.
Impact Assessment
The exposed credential may permit unauthorized use of the Telegram bot identity. Depending on the bot's configured permissions, an attacker may send fraudulent messages, spam users or channels, impersonate the legitimate notifica ...[truncated 333 chars]
- An attacker obtains a copy of the Skill package or reads
- Remediation
View remediation
Remediation Suggestions
- Revoke the exposed token immediately through Telegram's bot-management interface and generate a replacement.
- Remove the token from the source code and repository history.
- Load the replacement from a dedicated secret manager or a protected environment variable, such as
TELEGRAM_BOT_TOKEN. - Fail safely at startup if the secret is missing rather than falling back to an embedded credential.
- Restrict the bot to the minimum Telegram permissions needed to post notifications to the designated channel.
- Avoid printing the token or credential-bearing Telegram URLs in logs and exceptions.
- Add automated secret scanning to the development and release process.
- Review Telegram API activity and channel history for evidence of unauthorized use.
