CVE-2025-45156
📋 TL;DR
Splashin iOS v2.0 fails to properly enforce server-side interval restrictions for location updates for free-tier users, allowing them to potentially bypass intended usage limits. This affects all free-tier users of the Splashin iOS application version 2.0.
💻 Affected Systems
- Splashin iOS
📦 What is this software?
Splashin by Splashin
⚠️ Risk & Real-World Impact
Worst Case
Free-tier users could send location updates at higher frequencies than intended, potentially overwhelming server resources or gaining functionality reserved for paid tiers.
Likely Case
Free users bypass usage restrictions to get more frequent location updates than their tier allows, impacting service fairness and potentially causing minor performance issues.
If Mitigated
With proper server-side validation, location update intervals are enforced according to user tier, maintaining service integrity.
🎯 Exploit Status
Exploitation requires a free-tier user account and basic API manipulation skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://splashin.com
Restart Required: No
Instructions:
1. Check vendor advisory at http://splashin.com for updates. 2. Update to patched version when available. 3. No client restart should be needed for server-side fixes.
🔧 Temporary Workarounds
Server-side rate limiting
allImplement server-side validation of location update intervals based on user tier
Temporary free-tier restrictions
allApply stricter temporary limits to free-tier location updates until patch is available
🧯 If You Can't Patch
- Implement server-side validation middleware to check location update intervals against user tier permissions
- Monitor for abnormal location update patterns from free-tier accounts and implement alerting
🔍 How to Verify
Check if Vulnerable:
Test if free-tier user can send location updates more frequently than documented limits via API callsCheck Version:
Check app version in iOS Settings > General > About > VersionVerify Fix Applied:
Verify server properly rejects location updates from free-tier users that exceed interval restrictions📡 Detection & Monitoring
Log Indicators:
- Multiple location update requests from free-tier users within short timeframes
- Location update intervals shorter than documented free-tier limits
Network Indicators:
- Unusually frequent location API calls from free-tier user agents
- Location update payloads with manipulated timestamps
SIEM Query:
source="splashin_api" user_tier="free" location_update_count > 10 within 1h