CVE-2026-93871Network attack vector

Phishing redirects via unvalidated page destinations

Published Sep 18, 2026 · Updated Sep 18, 2026

Open redirect in Cotonti 1.0.0 and earlier allows remote authenticated users to send visitors to arbitrary external sites. The page display path in modules/page/inc/page.main.php strips the redir: prefix and places any HTTP, HTTPS, FTP, or FTPS destination directly in a 303 Location header without cot_url_check(). Page creation or edit permission is required, while administrative access is not; a visitor must open the crafted trusted-site page before redirection to a phishing site occurs.

CVSS severity5.1
Medium
EPSS probability0.27%
Next 30 days · Oct 19, 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.

Get started

Summary

What happened

Open redirect in Cotonti 1.0.0 and earlier allows remote authenticated users to send visitors to arbitrary external sites. The page display path in modules/page/inc/page.main.php strips the redir: prefix and places any HTTP, HTTPS, FTP, or FTPS destination directly in a 303 Location header without cot_url_check(). Page creation or edit permission is required, while administrative access is not; a visitor must open the crafted trusted-site page before redirection to a phishing site occurs.

The record

CVE
CVE-2026-93871
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Cotonti
Product
Cotonti
Classifications
CWE-601, T1566.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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=0 <=1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cotonti · Cotontiversion=0 <=1.0.0

Published CVSS scores

5.1GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/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

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1566.002Spearphishing 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

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started