CVE-2025-53530
📋 TL;DR
WeGIA web manager for charitable institutions has a vulnerability where excessively long HTTP GET requests to a specific URL can cause high resource consumption, leading to Denial of Service (DoS). Attackers can send requests with overly long errorstr parameters to degrade server performance or cause outages. All WeGIA servers running vulnerable versions are affected.
💻 Affected Systems
- WeGIA
📦 What is this software?
Wegia by Wegia
⚠️ Risk & Real-World Impact
Worst Case
Complete server unavailability due to resource exhaustion, preventing legitimate users from accessing the WeGIA application and disrupting charitable operations.
Likely Case
Significant performance degradation, increased latency, timeouts, and intermittent service disruptions affecting application usability.
If Mitigated
Minimal impact with proper rate limiting, request filtering, and monitoring in place to detect and block malicious requests.
🎯 Exploit Status
Exploitation requires sending HTTP GET requests with errorstr parameter exceeding normal length thresholds.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.0
Vendor Advisory: https://github.com/LabRedesCefetRJ/WeGIA/security/advisories/GHSA-562r-xgj9-2r7p
Restart Required: Yes
Instructions:
1. Backup current WeGIA installation and data. 2. Download WeGIA version 3.3.0 from official repository. 3. Replace existing installation with patched version. 4. Restart WeGIA service. 5. Verify functionality.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rule
allConfigure WAF to block HTTP GET requests with errorstr parameter exceeding safe length (e.g., 2000 characters).
Reverse Proxy Rate Limiting
linuxImplement rate limiting on reverse proxy (nginx/apache) to limit request frequency and size to vulnerable endpoints.
nginx example: limit_req_zone $binary_remote_addr zone=wegia:10m rate=10r/s;
apache example: SetEnvIf Request_URI "^/vulnerable-endpoint" RATELIMIT=1
🧯 If You Can't Patch
- Implement network-level filtering to block requests with excessively long parameters at firewall/load balancer.
- Monitor server resource usage and set alerts for abnormal request patterns or performance degradation.
🔍 How to Verify
Check if Vulnerable:
Send HTTP GET request to vulnerable endpoint with errorstr parameter exceeding 8142 characters and monitor server response/performance.Check Version:
Check WeGIA version in admin interface or configuration files.Verify Fix Applied:
After patching, attempt same long request - server should reject or handle without performance impact.📡 Detection & Monitoring
Log Indicators:
- Unusually long HTTP GET requests in access logs
- Increased error rates or timeouts
- High CPU/memory usage correlated with specific requests
Network Indicators:
- Abnormal request sizes to WeGIA endpoints
- Bursts of requests to specific URLs
SIEM Query:
source="web_logs" url="*errorstr*" AND request_length>2000