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CVE-2026-14856— Stored Cross-Site Scripting (XSS) in TastyIgniter Media Manager

Quick assessment

Affected
Media Manager TastyIgniter
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.

在 TastyIgniter v4.3.0 的媒体管理器文件上传功能中存在一种存储型跨站脚本（XSS）漏洞，该漏洞是由于对 SVG 文件进行验证和清理不足所导致。具有低权限的已认证用户可以上传包含 JavaScript 代码的恶意 SVG 文件。当管理员查看该文件时，代码将在其浏览器上下文中执行。通过将此漏洞与跨站请求伪造（CSRF）攻击结合，攻击者可以提取管理员的 CSRF 令牌，并执行未授权操作（例如修改凭据），从而获得对管理员账户的完全控制权。

CVSS 6.3 · Medium EPSS 0.39% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
Media Manager TastyIgniter 4.3.0 affected
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I. Basic Information for CVE-2026-14856

Vulnerability Information
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Vulnerability Title
Stored Cross-Site Scripting (XSS) in TastyIgniter Media Manager
Source: CVE Program / CVE List V5
Vulnerability Description
A stored Cross-Site Scripting (XSS) vulnerability in the file upload functionality of the Media Manager in TastyIgniter v4.3.0, caused by insufficient validation and sanitization of SVG files. An authenticated user with low privileges can upload a malicious SVG file containing JavaScript code. When an administrator views that file, the code executes in the context of their browser. By chaining this vulnerability with a Cross-Site Request Forgery (CSRF) attack, an attacker can extract the administrator’s CSRF token and perform unauthorized actions—such as modifying credentials—thereby gaining full control of the administrative account.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Media Manager TastyIgniter 4.3.0 -

II. Public POCs for CVE-2026-14856

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III. Intelligence Information for CVE-2026-14856

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Vendor Advisories for CVE-2026-14856 (1)

IV. Related Vulnerabilities

Same product: TastyIgniter
Same weakness: CWE-79

V. Comments for CVE-2026-14856

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