CVE-2026-55744Network attack vector

Forced file upload via missing CSRF validation

Published Jun 18, 2026 · Updated Jun 18, 2026

CSRF in Cotonti 1.0.0 Personal File Storage allows remote attackers to upload arbitrary files through an authenticated user's browser. The upload branch in modules/pfs/inc/pfs.main.php accepts multipart file data without calling cot_check_xg() to validate the anti-CSRF token. Exploitation requires an authenticated user to visit an attacker-controlled page, and the resulting files are stored in that user's PFS area.

CVSS severity8.6
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

CSRF in Cotonti 1.0.0 Personal File Storage allows remote attackers to upload arbitrary files through an authenticated user's browser. The upload branch in modules/pfs/inc/pfs.main.php accepts multipart file data without calling cot_check_xg() to validate the anti-CSRF token. Exploitation requires an authenticated user to visit an attacker-controlled page, and the resulting files are stored in that user's PFS area.

The record

CVE
CVE-2026-55744
Published
Jun 18, 2026
Updated
Jun 18, 2026
Vendor
Cotonti
Product
Cotonti
Classifications
CWE-352, CAPEC-62, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cotonti · Cotontiversion=1.0.0

Published CVSS scores

8.1TuranSecCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
8.6TuranSecCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo