PT-2026-29628 · Ci4Ms · Ci4Ms

Bugmithlegend · Published 2026-04-01 · Updated 2026-04-03 · CVE-2026-34563

Positive Technologies (AI Summary)

CVSS v3.1

9.9

Critical

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: CI4MS versions prior to 0.31.0.0

Description: The application does not properly sanitize user-controlled input when handling backup uploads and processing backup metadata. An attacker can inject a malicious JavaScript payload into the backup filename via the uploaded xss.sql file, which uses SQL functionality to insert the XSS payload server-side. This stored payload is later rendered unsafely in multiple backup management views without proper output encoding, leading to stored blind cross-site scripting (Blind XSS). Affected API endpoints include /backend/backup/upload, /backend/backup/, and /backup/{id}. The vulnerable parameter is the backup filename.

Recommendations: Update to version 0.31.0.0 or later.

Exploit

Fix

LPE

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-34563

GHSA-85M8-G393-JCXF

Affected Products

Ci4Ms

References · 9

• 🔥 https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-85m8-g393-jcxf · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-34563 · Security Note
• https://osv.dev/vulnerability/GHSA-85m8-g393-jcxf · Vendor Advisory
• https://github.com/ci4-cms-erp/ci4ms · Note
• https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0 · Note
• https://twitter.com/pulsepatchio/status/2040079753193890009 · Twitter Post
• https://twitter.com/TheHackerWire/status/2039553403920273594 · Twitter Post
• https://twitter.com/CveFindCom/status/2039677622418891083 · Twitter Post
• https://twitter.com/CVEnew/status/2039647752712548433 · Twitter Post