What is CVE-2025-12101?
Cross-Site Scripting (XSS) in NetScaler ADC and NetScaler Gateway when the appliance is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
The record classifies CVE-2025-12101 under weakness class CWE-79. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 328 days ago.
Severity and exploitation probability
- CVSS v4.0 base score
- 5.9 — Medium (derived from score)
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 - EPSS (FIRST)
- 25.0% probability of exploitation in the next 30 days, higher than 97.6% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 9.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2025-11-11, last modified 2025-11-12
Is CVE-2025-12101 being exploited?
Weaponised exploit code for CVE-2025-12101 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (javascript/cves/2025/CVE-2025-12101.yaml).
- 6h4ack/CVE-2025-12101-checker (github)
- boneys/CVE-2025-12101-Scanner-PoC (github)
Affected products and versions
- NetScaler: ADC, Gateway
How to fix CVE-2025-12101
No vendor patch reference has been recorded for CVE-2025-12101 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2025-12101
1 tracked threat in the Threadlinqs corpus references CVE-2025-12101, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.