Unauthenticated database disclosure via hashtag SQL injection
Published May 17, 2026 · Updated May 17, 2026
SQL injection in the hashtag request parameter in Bylancer Zechat 1.5 allows remote attackers to read database schema information. The application inserts the hashtag value into an SQL query without neutralizing SQL syntax, so a UNION SELECT payload reads table and column names from information_schema. No authentication or user interaction is required, and the demonstrated consequence is database-schema disclosure rather than operating-system command execution.
Summary
What happened
SQL injection in the hashtag request parameter in Bylancer Zechat 1.5 allows remote attackers to read database schema information. The application inserts the hashtag value into an SQL query without neutralizing SQL syntax, so a UNION SELECT payload reads table and column names from information_schema. No authentication or user interaction is required, and the demonstrated consequence is database-schema disclosure rather than operating-system command execution.
The record
- CVE
- CVE-2018-25338
- Published
- May 17, 2026
- Updated
- May 17, 2026
- Vendor
- Bylancer
- Product
- Zechat
- Classifications
- CWE-89, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 17, 2026CVE publishedPublication date reported by the CVE source.
- May 17, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=1.5
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Zechat 1.5 SQL Injectionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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