CVE intelligence and bounded remediation

CVE-2016-9257 — F5 Big-Ip Access Policy Manager security vulnerability

Medium CVSS 6.1

In F5 BIG-IP APM 12.0.0 through 12.1.2, non-authenticated users may be able to inject JavaScript into a request that will then be rendered and executed in the context of the Administrative user when the Administrative user is viewing the Access System Logs, allowing the non-authenticated user to carry out a Cross Site Scripting (XSS) attack against the Administrative user.

Severity
Medium
CVSS
6.1 (3.0)
Published
2017-05-09
CISA KEV
Not currently listed
Ecosystem
javascript/npm
Weaknesses
CWE-79

Affected products

  • f5 / big-ip_access_policy_manager / 12.0.0
  • f5 / big-ip_access_policy_manager / 12.1.0
  • f5 / big-ip_access_policy_manager / 12.1.1
  • f5 / big-ip_access_policy_manager / 12.1.2

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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