CVE-2025-66391Public exploitNetwork attack vector

Authenticated OTP delivery via client-side authorization bypass

Published Jun 17, 2026 · Updated Jun 17, 2026

Improper access control in Citrix Cloud through 2025-11-10 allows remote authenticated users to initiate privileged identity workflows. Citrix Cloud trusts client-controlled profile response fields such as canChangePassword and canChangePrimaryEmail, exposing privileged pages without server-side role validation. Read-only access is required; demonstrated impact is OTP delivery to an attacker-controlled email and password-change initiation, not completed takeover.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Citrix Cloud through 2025-11-10 allows remote authenticated users to initiate privileged identity workflows. Citrix Cloud trusts client-controlled profile response fields such as canChangePassword and canChangePrimaryEmail, exposing privileged pages without server-side role validation. Read-only access is required; demonstrated impact is OTP delivery to an attacker-controlled email and password-change initiation, not completed takeover.

The record

CVE
CVE-2025-66391
Published
Jun 17, 2026
Updated
Jun 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1098Account Manipulation

Public exploit references

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

Technologies

Your stack

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Your stack

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