Wongnai 2020 Data Breach
Food & Dining / Reviews & Lifestyle / Consumer / Thailand
Wongnai 2020 Data Breach: 4.3 Million Thai Users Exposed
Thai restaurant-review and lifestyle platform (Thailand's Yelp).
Confirmed · ObscureIQ Intelligence
Breach Risk Index i
17/100
Lower riskHigher risk
Lower: limited current risk based on data value and recency.
Data Sensitivity i
StandardExposed data is largely lower-sensitivity. Standard identity-protection precautions are advised.
3.9MRecords
2020Year
The Breach Risk Index (BRI) is a proprietary 0–100 score rating how dangerous a breach is right now, based on how recently the data has been circulating on the dark web and how valuable it is to attackers.
Breach Summary
On October 28, 2020, Wongnai was breached, exposing about 4.3 million records including email addresses, passwords, Facebook and Twitter IDs, names, birthdates, phone numbers and postal codes. The data was among 34 million records from 17 companies advertised by a single seller.
Full threat analysis, exploitation vectors, and principal guidance below.
10 additional sections · verified field analysis · defensive doctrine
Querying breach corpus…
Cross-referencing exposed field types…
Resolving threat-actor attribution…
Compiling principal risk advisory…
3.9M records analyzed
About Wongnai
Wongnai is a leading Thai restaurant-review, food-delivery and lifestyle platform, often described as Thailand's equivalent of Yelp.
Why They Hold Your Data
A reviews and lifestyle platform holds user identity and contact data, dates of birth, phone numbers, postal codes, linked social-media (Facebook/Twitter) IDs and account passwords.
Recent Developments
Wongnai urged users to reset passwords after the October 2020 breach, which was part of a batch of 17 companies' data offered by one seller.
Data Points Exposed
8 verified field types
Date of Birth High
Email Address
Full Name
Geographic location
IP Address
Password High
Phone Number
Social Media Profile
Breach Impact
The breach exposed a large Thai user base and drew attention under Thailand's PDPA regime.
Exploitation & Downstream Threats
• Credential stuffing against reused passwords across other platforms | • Identity verification bypass using name + date of birth combination | • SIM swap attacks where phone numbers are present | • Targeted phishing campaigns using exposed email addresses | • Doxxing risk from physical address exposure | • Social media account targeting and impersonation
Principal Risk Advisory
What this means for a principal
A consumer-service breach: contact and account data supports phishing, account takeover and profile enrichment. For a high-profile principal the main risk is credible impersonation and enrichment of existing exposure.
What You Should Do
- Reset any reused passwords and enable MFA on email first, then financial accounts.
- Guard against SIM-swap and vishing: add a carrier port-out PIN and verify any 'support' calls independently.
- Do not use unofficial 'am I affected' lookups; several are themselves harvesting operations.
How ObscureIQ Can Help
- Corpus confirmation: determine whether and where the principal (plus household and staff) appear in this dataset and which specific fields are exposed for them.
- Exposure mapping and footprint neutralization: cross-reference against broker-available data and suppress still-removable elements, prioritizing address and phone, since this record re-seeds broker networks.
- ThreatWatch tuned to this incident's identifiers and misuse pattern (impersonation and targeting patterns, not generic credential monitoring).
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