CVE-2026-63233— SQL injection and unsafe deserialisation vulnerability
Quick assessment
Affected
Three Learning Koollab LMS
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.
Three Learning Koollab LMS是Three Learning公司的一款学习管理系统。 Three Learning Koollab LMS 5.3.2版本存在安全漏洞，该漏洞源于SQL注入和不安全反序列化，攻击者可通过评估总体答案端点注入，控制传递给unserialize()的数据，写入webshell到可公开访问位置，并在服务器上执行任意代码。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Three Learning | Koollab LMS | 5.3.2 |
affected |
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I. Basic Information for CVE-2026-63233
Vulnerability Information
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Vulnerability Title
SQL injection and unsafe deserialisation vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A SQL injection and unsafe deserialisation
vulnerability in Koollab LMS allowed an authenticated attacker to inject through the assessment
overall answer endpoint, control data passed to unserialize(), write a webshell
to a publicly accessible location, and execute arbitrary code on the server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Three Learning Koollab LMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Three Learning Koollab LMS是Three Learning公司的一款学习管理系统。 Three Learning Koollab LMS 5.3.2版本存在安全漏洞，该漏洞源于SQL注入和不安全反序列化，攻击者可通过评估总体答案端点注入，控制传递给unserialize()的数据，写入webshell到可公开访问位置，并在服务器上执行任意代码。
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 |
|---|---|---|---|---|
| Three Learning | Koollab LMS | 5.3.2 | - |
|
II. Public POCs for CVE-2026-63233
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-63233 (1)
Same Patch Batch · Three Learning · 2026-07-29 · 15 CVEs total
| CVE-2026-63234 | 9.9 CRITICAL | SQL injection and unsafe deserialisation vulnerability |
| CVE-2026-63232 | 9.9 CRITICAL | SQL injection and unsafe deserialisation vulnerability |
| CVE-2026-63230 | 9.1 CRITICAL | Pre-authentication error-based SQL injection vulnerability |
| CVE-2026-63229 | 9.1 CRITICAL | Pre-authentication blind SQL injection vulnerability |
| CVE-2026-63231 | 8.1 HIGH | Post-authentication SQL injection vulnerability |
| CVE-2026-63238 | 6.5 MEDIUM | Authentication bypass vulnerability |
| CVE-2026-63239 | 5.4 MEDIUM | Hard-coded AWS IAM credentials vulnerability |
| CVE-2026-63237 | 4.8 MEDIUM | TOTP two-factor authentication bypass vulnerability |
| CVE-2026-63242 | 4.3 MEDIUM | Business logic vulnerability |
| CVE-2026-63240 | 4.3 MEDIUM | Information disclosure vulnerability |
| CVE-2026-63236 | 3.7 LOW | Improper access control vulnerability |
| CVE-2026-63235 | 3.7 LOW | Improper access control vulnerability |
| CVE-2026-63241 | 3.1 LOW | Insecure direct object reference vulnerability |
| CVE-2026-63228 | 2.6 LOW | Unrestricted image upload vulnerability |
IV. Related Vulnerabilities
V. Comments for CVE-2026-63233
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