CVE-2026-63228— Unrestricted image upload 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，该漏洞源于不受限制的图像上传漏洞，允许已认证的攻击者通过反馈邮件注册端点上传伪装成图像文件的恶意内容，从而可能进一步攻击服务器。
Possible ATT&CK Techniques 3 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application T1505.003 · Web ShellAffected 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-2026-63228
Vulnerability Information
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Vulnerability Title
Unrestricted image upload vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
An unrestricted image upload vulnerability in
Koollab LMS allowed
an authenticated attacker to upload malicious content disguised as an image
file via the feedback mail registration endpoint, potentially enabling further
attacks on the server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
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，该漏洞源于不受限制的图像上传漏洞，允许已认证的攻击者通过反馈邮件注册端点上传伪装成图像文件的恶意内容，从而可能进一步攻击服务器。
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-2026-63228
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-63228 (1)
Same Patch Batch · Three Learning · 2026-07-29 · 15 CVEs total
| CVE-2026-63233 | 9.9 CRITICAL | SQL injection and unsafe deserialisation vulnerability |
| 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 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-63228
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