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CVE-2018-25339— Zechat 1.5 SQL Injection via v parameter (time-based blind)

Quick assessment

Affected
Bylancer Zechat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Bylancer Zechat是Bylancer公司的一个支持实时消息、群组聊天与社交互动的PHP即时通讯系统。 Bylancer Zechat 1.5版本存在SQL注入漏洞，该漏洞源于v参数存在SQL注入，可能导致未经身份验证的攻击者利用基于时间的盲注技术提取数据库信息。

CVSS 8.2 · High EPSS 0.27% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
Bylancer Zechat 1.5 affected
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I. Basic Information for CVE-2018-25339

Vulnerability Information
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Vulnerability Title
Zechat 1.5 SQL Injection via v parameter (time-based blind)
Source: CVE Program / CVE List V5
Vulnerability Description
Zechat 1.5 contains a SQL injection vulnerability in the v parameter that allows unauthenticated attackers to extract database information using time-based blind techniques. Attackers can exploit the v parameter with sleep-based blind injection to confirm vulnerability and extract data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Bylancer Zechat SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bylancer Zechat是Bylancer公司的一个支持实时消息、群组聊天与社交互动的PHP即时通讯系统。 Bylancer Zechat 1.5版本存在SQL注入漏洞，该漏洞源于v参数存在SQL注入，可能导致未经身份验证的攻击者利用基于时间的盲注技术提取数据库信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Bylancer Zechat 1.5 -

II. Public POCs for CVE-2018-25339

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III. Intelligence Information for CVE-2018-25339

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Vendor Advisories for CVE-2018-25339 (1)

Exploits & Public PoCs for CVE-2018-25339 (1)

Other References for CVE-2018-25339 (1)

Same Patch Batch · Bylancer · 2026-05-17 · 3 CVEs total

CVE-2018-25338 8.2 HIGH Zechat 1.5 SQL Injection via hashtag parameter
CVE-2018-25334 5.4 MEDIUM Zechat 1.5 Cross-Site Request Forgery (CSRF) via hashtag parameter

IV. Related Vulnerabilities

Same product: Zechat
Same vendor: Bylancer
Same weakness: CWE-89

V. Comments for CVE-2018-25339

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