CVE-2026-93873Public exploitNetwork attack vector

Forged administrator messages via missing CSRF validation

Published Sep 18, 2026 · Updated Sep 18, 2026

Cross-site request forgery in Cotonti through 1.0.0 allows remote attackers to send forged contact messages to administrators. The contact handler in plugins/contact/contact.php accepts the rtext POST field and calls cot_mail without invoking cot_check_xg to validate an anti-CSRF token. Exploitation requires a victim to visit an attacker-controlled page that auto-submits the form; authenticated and guest visitors can both be used to originate forged messages.

CVSS severity5.3
Medium
EPSS probability0.19%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Cotonti through 1.0.0 allows remote attackers to send forged contact messages to administrators. The contact handler in plugins/contact/contact.php accepts the rtext POST field and calls cot_mail without invoking cot_check_xg to validate an anti-CSRF token. Exploitation requires a victim to visit an attacker-controlled page that auto-submits the form; authenticated and guest visitors can both be used to originate forged messages.

The record

CVE
CVE-2026-93873
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Cotonti
Product
Cotonti
Classifications
CWE-352, CAPEC-62, T1204
Attack vector
network
Privileges
unauthenticated

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

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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 privilegesunauthenticated

What is affected?

Cotonti · Cotontiversion=0 <=1.0.0

Published CVSS scores

4.3VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.3VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1204User Execution

Public exploit references

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Technologies

Your stack

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Your stack

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