CTI · corroborated · 2026-09-18

Telegram Desktop stored XSS in HTML export exfiltrates chat history for 2+ years

Full story & timeline

MITRE ATT&CK

• T1189 Drive-by Compromise Initial Access
• T1204 User Execution Execution
• T1005 Data from Local System Collection
• T1567 Exfiltration Over Web Service Exfiltration

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://meterpreter.org/