Stored Cross-Site Scripting in Cotonti Siena Affects User Security
CVE-2026-58144

5.1MEDIUM

Key Information:

Vendor

Cotonti

Status
Cotonti
Vendor
CVE Published:
9 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-58144?

Cotonti Siena versions prior to 0.9.27 are susceptible to a stored cross-site scripting (XSS) vulnerability that occurs when authenticated users with PFS (Personal Files System) access can inject arbitrary script payloads through the ntitle parameter. This malicious HTML code is processed through the TXT filter in pfs.main.php, leading to the creation of folders with titles that contain unescaped script tags. When any user, including administrators, views the affected folder listing, the malicious scripts can execute in their browsers, potentially compromising their sessions and data.

Affected Version(s)

Cotonti 0 <= 0.9.26

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-58144 - Proof of Concept

References

https://gist.github.com/sermikr0/75686815e441c07462cfdea2...
technical-descriptionexploit

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Saidakbarxon Maxsudxonov
.