Zechat 1.5 SQL Injection Allows Unauthenticated Database Extraction
The National Vulnerability Database (NVD) reports a critical SQL injection vulnerability, CVE-2018-25339, in Zechat version 1.5. This flaw, rated 8.2 (HIGH) on the CVSS scale, resides in the v parameter and allows unauthenticated attackers to extract sensitive database information.
Attackers can leverage time-based blind SQL injection techniques, specifically sleep-based methods, to confirm the vulnerability and then systematically exfiltrate data. This type of attack is insidious because it often leaves minimal forensic traces, making detection challenging for defenders focused solely on direct error-based injections.
While the NVD does not specify affected products beyond Zechat 1.5, the nature of SQL injection means any application utilizing this chat software could be at risk. Organizations running Zechat 1.5 should treat this as a high-priority patch or mitigation effort, as successful exploitation grants attackers significant data access.
What This Means For You
- If your organization uses Zechat 1.5, you are exposed to unauthenticated database compromise. Attackers can extract critical data without needing any credentials. Immediately identify all instances of Zechat 1.5 in your environment and apply available patches or implement strong input validation and web application firewall rules to mitigate the `v` parameter vulnerability.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2018-25339 - Zechat 1.5 SQL Injection via 'v' parameter
title: CVE-2018-25339 - Zechat 1.5 SQL Injection via 'v' parameter
id: scw-2026-05-17-ai-1
status: experimental
level: high
description: |
Detects attempts to exploit the SQL injection vulnerability in Zechat version 1.5 by looking for the 'v' parameter containing sleep-based blind SQL injection payloads. This is the primary method for unauthenticated database extraction.
author: SCW Feed Engine (AI-generated)
date: 2026-05-17
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2018-25339/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri-query|contains:
- "v=SELECT SLEEP("
- "v=AND SLEEP("
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2018-25339 | SQLi | Zechat 1.5 |
| CVE-2018-25339 | SQLi | v parameter |
| CVE-2018-25339 | SQLi | time-based blind SQL injection |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 17, 2026 at 16:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
Believe this infringes your rights? Submit a takedown request.
Related coverage
CVE-2026-20240 — Denial of Service
CVE-2026-20240 — In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, and Splunk Cloud Platform versions below 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13, and 9.3.2411.129,...
Splunk Enterprise, Cloud Vulnerability Exposes Session Cookies, Sensitive Data
CVE-2026-20239 — In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a...
CVE-2026-20238 — In Splunk AI Toolkit versions below 5.7.3, a low-privileged
CVE-2026-20238 — In Splunk AI Toolkit versions below 5.7.3, a low-privileged user that does not hold the 'admin' or 'power' roles could access confidential data...