---
id: CVE-2026-78838
title: >-
  A reflected cross-site scripting (XSS) vulnerability in the
  grid_datasource.php component of AppNitro MachForm v30 allows attackers to
  execute arbitrary Javascript in the context of the victim's browser via
  injecting a crafted payload in…
summary: >-
  A reflected cross-site scripting (XSS) vulnerability in the
  grid_datasource.php component of AppNitro MachForm v30 allows attackers to
  execute arbitrary Javascript in the context of the victim's browser via
  injecting a crafted payload in…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'
cwe:
  - CWE-79
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:20:42.387'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78838'
references:
  - url: 'https://github.com/nabeelmkhan/CVE-2026-78838'
    label: cve@mitre.org
  - url: 'https://packetstormsecurity.com'
    label: cve@mitre.org
  - url: 'https://github.com/nabeelmkhan/CVE-2026-78838'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-09T19:47:31.710636Z'
epss: 0.00389
epssPercentile: 0.30228
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/nabeelmkhan/CVE-2026-78838'
  checkedAt: '2026-09-26T09:06:00.951Z'
ingestedAt: '2026-09-08T15:33:26.985Z'
---

## Overview

A reflected cross-site scripting (XSS) vulnerability in the grid_datasource.php component of AppNitro MachForm v30 allows attackers to execute arbitrary Javascript in the context of the victim's browser via injecting a crafted payload into the filter[filters][0][field] parameter.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.