CVE intelligence and bounded remediation
CVE-2021-42856 — It was discovered that the /DsaDataTest endpoint is susceptible to Cross-site scripting (XSS) attack
It was discovered that the /DsaDataTest endpoint is susceptible to Cross-site scripting (XSS) attack. It was noted that the Metric parameter does not have any input checks on the user input that allows an attacker to craft its own malicious payload to trigger a XSS vulnerability.
- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Published
- 2022-03-10
- CISA KEV
- Not currently listed
- Ecosystem
- software/application
- Weaknesses
- CWE-20, CWE-79
Affected products
- riverbed / steelcentral_appinternals_dynamic_sampling_agent
- riverbed / steelcentral_appinternals_dynamic_sampling_agent / 10.0.0
Showing 2 representative product identities from 3 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.
Matched remediation archetype
Cross-site scripting and unsafe browser output
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
- Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
- Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.
Remediate safely
- Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
- Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
- Update affected rendering components and add tests for every output context using inert sentinel markup.
Authoritative sources
Complete CVE record and remediation plan
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