Security readout for executives and security teams
Plain-English summary
This CVE is a stored cross-site scripting issue in ServiceNow IT Service Management. An attacker who can submit a crafted Incident Request could cause malicious content to be stored and later run in another user’s browser. Business impact depends on who can access the affected catalog workflow and whether privileged users view the stored content.
Executive priority
Prioritize remediation if affected ServiceNow ITSM versions are still in use, especially where external users or broad employee groups can submit incidents. Stored XSS can undermine trust in a workflow platform and may expose session or workflow data, but the provided sources do not support emergency treatment based on active exploitation.
Technical view
The CVE description names stored XSS through crafted sysparm_item_guid and sys_id parameters in an Incident Request to service_catalog.do. Affected versions are Kingston through Patch 14-1, London through Patch 7, and Madrid before Patch 4. The source bundle provides no CVSS score, CWE, detailed exploit prerequisites, or vendor remediation text beyond affected patch boundaries.
Likely exposure
Exposure is likely limited to ServiceNow ITSM instances running the named Kingston, London, or Madrid patch levels with the affected Incident Request path available. Internet exposure, authentication requirements, tenant configuration, and role requirements are not established in the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Public references attribute the finding to an Outpost24 responsible disclosure about multiple stored XSS vulnerabilities in ServiceNow ITSM, but the bundle does not provide exploit maturity or observed campaign evidence.
Researcher notes
Key gaps are CVSS, authentication requirements, role requirements, sanitization details, and fixed-version wording from ServiceNow. Treat the version ranges in the CVE description as the strongest exposure evidence. Avoid assuming exploitability outside the Incident Request service_catalog.do flow named in the record.
Mitigation direction
- Identify all ServiceNow ITSM instances and their family and patch levels.
- Upgrade beyond the affected Kingston, London, and Madrid patch levels per ServiceNow guidance.
- Check ServiceNow advisories or support notes for official fixes and compensating controls.
- Restrict access to affected catalog workflows where business requirements allow.
- Review custom catalog items or Incident Request modifications for unsafe rendering behavior.
Validation and detection
- Confirm whether any instance runs Kingston through Patch 14-1, London through Patch 7, or Madrid before Patch 4.
- Verify whether service_catalog.do Incident Request functionality is enabled and reachable.
- Review application logs for unusual service_catalog.do requests using sysparm_item_guid or sys_id parameters.
- Test remediation only in an approved non-production ServiceNow instance.
- Document patch status and residual exposure for each ServiceNow instance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2019-20768 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://outpost24.com/blog?tags=307CVE reference · x_refsource_MISC
- https://outpost24.com/blog/Responsible-disclosure-Multiple-stored-XSS-vulnerabilities-discovered-in-ServiceNow-ITSMCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.