CVE-2025-12101Public exploitNetwork attack vector

Cross-site scripting via CRLF response injection

Published Nov 11, 2025 · Updated Nov 11, 2025

Cross-site scripting in NetScaler ADC and NetScaler Gateway allows remote attackers to inject browser-executed content into HTTP responses. The /cgi/logout SAML flow decodes attacker-controlled RelayState data and accepts embedded CRLF sequences that replace the response content type and body with script-bearing HTML. Reachability requires a Gateway or AAA virtual server, a valid SAMLResponse, and active user interaction through a CSRF delivery path; the script executes in the appliance origin.

CVSS severity5.9
Medium
EPSS probability25.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in NetScaler ADC and NetScaler Gateway allows remote attackers to inject browser-executed content into HTTP responses. The /cgi/logout SAML flow decodes attacker-controlled RelayState data and accepts embedded CRLF sequences that replace the response content type and body with script-bearing HTML. Reachability requires a Gateway or AAA virtual server, a valid SAMLResponse, and active user interaction through a CSRF delivery path; the script executes in the appliance origin.

The record

CVE
CVE-2025-12101
Published
Nov 11, 2025
Updated
Nov 11, 2025
Vendor
Cloud Software Group
Product
NetScaler Gateway
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 11, 2025Record 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=12.1-FIPS and NDcPP <55.333
  2. Affected versionversion=13.1 <60.32
  3. Affected versionversion=13.1-FIPS and NDcPP <37.250
  4. Affected versionversion=14.1 <56.73

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cloud Software Group · NetScaler Gatewayversion=12.1-FIPS and NDcPP <55.333; version=13.1 <60.32; version=13.1-FIPS and NDcPP <37.250; version=14.1 <56.73
Cloud Software Group · NetScaler ADCversion=12.1-FIPS and NDcPP <55.333; version=13.1 <60.32; version=13.1-FIPS and NDcPP <37.250; version=14.1 <56.73

Published CVSS scores

5.9Citrix Systems, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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