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CVE-2026-14856

MediumPublished

Stored Cross-Site Scripting (XSS) in TastyIgniter Media Manager

Published: Jul 27, 2026
Updated: Jul 27, 2026
Assigning CNA: INCIBE
Evidence observed: Aug 6, 2026

Primary CVSS

6.3/ 10Medium

nvd · CVSS 4.0

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 21.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-14856-TastyIgniterPoC
Technical analysis and PoC for CVE-2026-14856, a stored XSS in TastyIgniter v4.3.0 Media Manager that chains with CSRF to achieve admin account takeover.
CVE-2026-14856-TastyIgniterPoC
CVE-2026-14856 TastyIgniter v4.3.0

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