xs-leaks
XS-Leaks — cross-site information leaks via timing, frame counting, navigation, error oracles. Side-channel attacks against same-origin authenticated state.
49
53%
Does it follow best practices?
Run evals on this skill
Adds up to 20 points to the overall score
View guide
Critical
Do not install without reviewing
Fix and improve this skill with Tessl
tessl review fix ./packages/decepticon/decepticon/skills/standard/exploit/web/xs-leaks/SKILL.mdSecurity
1 critical severity finding. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
This document is an explicit attacker-oriented writeup: it describes XS-Leak techniques, includes PoC code for timing/frame-counting/ID-guessing attacks that enable cross-origin data exfiltration and victim-identifying leaks, and even instructs adversary operations (attacker host, recording victim), indicating deliberate malicious intent.
- Repository
- PurpleAILAB/Decepticon
- Commit
e34afba
- Audited
- Security analysis
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.