Vulnerabilities

CVE-2025-12420 is a critical permission-preservation flaw (CWE-250) in the ServiceNow AI Platform that lets an unauthenticated, network-attainable attacker impersonate another user with no privileges, user interaction, or special conditions required. Once impersonating a victim, the attacker can perform every operation that user is entitled to perform, with high impact on confidentiality, integrity, and availability across the affected scope. The issue affects instances using the Now Assist AI Agents and Virtual Agent API components, in both ServiceNow-hosted and self-hosted/partner deployments. ServiceNow deployed the fix to hosted instances in October 2025 and shipped security updates to self-hosted, partner, and uniquely configured hosted customers, and addressed the flaw in listed Store App versions. There is no public proof-of-concept and the flaw is not yet in CISA KEV, but its EPSS of 49.1% (99th percentile) indicates a high near-term probability of exploitation, so unpatched self-hosted instances remain the main residual risk.

Do: Self-hosted, partner, and uniquely configured hosted customers should promptly apply the ServiceNow security update or upgrade, and customers using the affected Store Apps should upgrade Now Assist AI Agents and Virtual Agent API to the fixed listed versions in ServiceNow's advisory; hosted-instance customers should verify ServiceNow applied the October 2025 fix. Review logs for anomalous impersonation activity (unexpected impersonation or swap-by events) to detect possible abuse, since exploitation requires no authentication or user interaction.

ServiceNow has addressed an input validation vulnerability that was identified in the Now Platform. This vulnerability could enable an unauthenticated user to remotely execute code within the context of the Now Platform. ServiceNow deployed an update to hosted instances and ServiceNow provided the update to our partners and self-hosted customers. Further, the vulnerability is addressed in the listed patches and hot fixes.

CVE-2024-4879 is an improper input validation flaw (CWE-1287) in the ServiceNow Now Platform that permits jelly template injection through UI macros. An unauthenticated attacker can submit crafted input that is improperly handled by the jelly templating engine, resulting in code execution on the instance. Successful exploitation therefore grants unauthenticated remote code execution on affected ServiceNow deployments. Organizations running Utah, Vancouver, or Washington DC Now Platform releases are affected, including the many enterprises and government agencies that expose ServiceNow portals to the internet for employee, customer, or citizen use. The flaw is confirmed exploited in the wild (added to CISA KEV on 2024-07-29), carries a maximal EPSS estimate of 100% probability of exploitation within 30 days, and has no known public PoC.

Do: Apply the patched Now Platform builds for the Utah, Vancouver, and Washington DC release trains per ServiceNow's advisory, as required by the CISA KEV listing. Because exploitation is confirmed and requires no authentication, prioritize internet-facing instances, restrict public access where feasible until patched, and review instance logs for signs of exploitation. Confirm every release train in your environment is covered, since all three (Utah, Vancouver, Washington DC) are affected.

ServiceNow has released upgrades and patches that address a Reflected Cross-Site scripting (XSS) vulnerability that was identified in the ServiceNow Polaris Layout. This vulnerability would enable an authenticated user to inject arbitrary scripts.

ServiceNow has released patches and an upgrade that address an Access Control List (ACL) bypass issue in ServiceNow Core functionality. Additional Details This issue is present in the following supported ServiceNow releases: * Quebec prior to Patch 10 Hot Fix 8b * Rome prior to Patch 10 Hot Fix 1 * San Diego prior to Patch 7 * Tokyo prior to Tokyo Patch 1; and * Utah prior to Utah General Availability If this ACL bypass issue were to be successfully exploited, it potentially could allow an authenticated user to obtain sensitive information from tables missing authorization controls.

Cross-Site Scripting (XSS) vulnerabilities exist in ServiceNow records allowing an authenticated attacker to inject arbitrary scripts.

There exists a reflected XSS within the logout functionality of ServiceNow versions lower than Quebec Patch 10 Hotfix 11b, Rome Patch 10 Hotfix 3b, San Diego Patch 9, Tokyo Patch 4, and Utah GA. This enables an unauthenticated remote attacker to execute arbitrary JavaScript code in the browser-based web console.

There exists an open redirect within the response list update functionality of ServiceNow. This allows attackers to redirect users to arbitrary domains when clicking on a URL within a service-now domain.

A XSS vulnerability was identified in the ServiceNow UI page assessment_redirect. To exploit this vulnerability, an attacker would need to persuade an authenticated user to click a maliciously crafted URL. Successful exploitation potentially could be used to conduct various client-side attacks, including, but not limited to, phishing, redirection, theft of CSRF tokens, and use of an authenticated user's browser or session to attack other systems.

A cross-site scripting (XSS) vulnerability in Employee Service Center (esc) and Service Portal (sp) in ServiceNow Quebec, Rome, and San Diego allows remote attackers to inject arbitrary web script via the Standard Ticket Conversations widget.

ServiceNow through San Diego Patch 4b and Patch 6 allows reflected XSS in the logout functionality.

The password-reset form in ServiceNow Orlando provides different responses to invalid authentication attempts depending on whether the username exists.

ServiceNow IT Service Management Kingston through Patch 14-1, London through Patch 7, and Madrid before patch 4 allow stored XSS via crafted sysparm_item_guid and sys_id parameters in an Incident Request to service_catalog.do.

report_viewer.do in ServiceNow Release Jakarta Patch 8 and earlier allows remote attackers to execute arbitrary code via '${xyz}' Glide Scripting Injection in the sysparm_media parameter.

ServiceNow ITSM 2016-06-02 has XSS via the First Name or Last Name field of My Profile (aka navpage.do), or the Search bar of My Portal (aka search_results.do).