Research demo
Scamlexity: Perplexity Comet completes a purchase on a fake Walmart, fills credentials on a Wells Fargo phishing page, and falls for PromptFix
AIR-2025-0107 AIR record · 2025-08-guardio-scamlexity-comet
From the supporting source
In the AI-vs-AI era, scammers don't need to trick millions of different people; they only need to break one AI model.guard.io
The record
Disclosed
2025-08-20
Vendor
Perplexity
Product
Perplexity Comet
Risk domain
Access control and permissions › Credential theft
Also touches
Unsafe actuation
System type
Generative model
Who acted
Agent acted — Comet completed a checkout and typed credentials into a phishing page
Attack surface
Browser agent
Autonomy level
Semi-autonomous
Initial vector
Malicious web content and phishing email
Impact type
Financial loss, Credential theft, Malware delivery
Confidence
High
Submitted by
EAI Internal
Crosswalk
- OWASP Agentic Top 10 (2026)
- ASI03 – Identity and Privilege Abuse
- MITRE ATLAS
- AML.T0012 – Valid Accounts
- NIST AI RMF
- MEASURE 2.7
- EU AI Act
- Article 13
- ISO/IEC
- TR 24028; 42001; 23894
- AIUC-1
- B. Security
- Scope
- tool failure
- Mitigation
- Use secure credential storage; Implement short-lived tokens.
- Taxonomy
- Enkrypt AI agent risk taxonomy · Black-Box Red Teaming of Agentic AI: A Taxonomy-Driven Framework for Automated Risk Discovery
Blast radius
Comet users delegating shopping or inbox triage
Capability abused
Defense & remediation
Recorded defense
none observed - no user confirmation before payment; no phishing check on the emailed link
Guardrail kinds
None
Guardrail outcome
Not applicable
Fix shipped
unknown
Taxonomy & references
Curator notes
Guardio Labs (Nati Tal, Shaked Chen). Three scenarios: (1) counterfeit Walmart storefront - Comet auto-filled saved address and card and completed an Apple Watch purchase with no confirmation; (2) a Wells Fargo phishing email from a Protonmail sender - Comet treated it as a legitimate to-do, opened the phishing page and entered credentials; (3) 'PromptFix', an AI-era ClickFix: instructions hidden inside a fake CAPTCHA got the agent to click an 'AI bypass button' triggering a drive-by download. Stores were researcher-controlled, so no real money lost.
Supporting sources
Cite as
Enkrypt AI. "Scamlexity: Perplexity Comet completes a purchase on a fake Walmart, fills credentials on a Wells Fargo phishing page, and falls for PromptFix". AIR, AIR-2025-0107. https://agentincident.vercel.app/i/AIR-2025-0107/ (accessed 2026-10-19).