CVE-2026-54219— Stored XSS in UBB.threads
Quick assessment
Affected
UBB Systems UBB.threads
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.
UBB Systems UBB.threads是UBB Systems社区的一个论坛软件系统。 UBB Systems UBB.threads 7.7.5及之前版本存在跨站脚本漏洞，该漏洞源于用户输入清理不足，可能导致低权限攻击者注入任意JavaScript，在受害者浏览时执行存储型跨站脚本攻击。
Possible ATT&CK Techniques 1 AI
T1059.001 · PowerShellAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| UBB Systems | UBB.threads | ≤ 7.7.5 |
affected |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-54219
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Stored XSS in UBB.threads
Source: CVE Program / CVE List V5
Vulnerability Description
UBB.threads is vulnerable to Stored XSS via user posts and user profile fields. The application fails to properly sanitize user input, allowing low privileged attackers to inject arbitrary JavaScript that executes in a victim's browser upon viewing.
Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
UBB Systems UBB.threads 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
UBB Systems UBB.threads是UBB Systems社区的一个论坛软件系统。 UBB Systems UBB.threads 7.7.5及之前版本存在跨站脚本漏洞，该漏洞源于用户输入清理不足，可能导致低权限攻击者注入任意JavaScript，在受害者浏览时执行存储型跨站脚本攻击。
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 |
|---|---|---|---|---|
| UBB Systems | UBB.threads | 0 ~ 7.7.5 | - |
|
II. Public POCs for CVE-2026-54219
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-54219
请登录查看更多情报信息。
Security Blog Posts for CVE-2026-54219 (1)
-
🔗 Vulnerabilities in UBB.threads software | CERT Polska third-party-advisory
Same Patch Batch · UBB Systems · 2026-06-18 · 6 CVEs total
| CVE-2026-54224 | Denial of Service in UBB.threads | |
| CVE-2026-54221 | Reflected XSS in UBB.threads | |
| CVE-2026-54222 | Blind SQL Injection in UBB.threads | |
| CVE-2026-54223 | Remote Code Execution via arbitrary file read and write in UBB.threads | |
| CVE-2026-54220 | Cross-Site Request Forgery in UBB.threads |
IV. Related Vulnerabilities
Same product: UBB.threads
Same weakness: CWE-79
-
CVE-2026-111932
Coder before 2.34.2 Stored HTML Injection via Appearance Set -
CVE-2026-111903
phpMyFAQ 4.2.0-alpha before 4.2.0-beta Stored XSS via SVG DT -
CVE-2026-111894
phpMyFAQ 3.2.1 before 4.1.9 and 4.2.0-alpha before 4.2.0-bet -
CVE-2026-109701
WordPress PAYCOMET for WooCommerce plugin <= 5.45 - Cross Si -
CVE-2026-100316
European VAT Compliance Assistant for WooCommerce <= 1.36.10
V. Comments for CVE-2026-54219
No comments yet