Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Affected scope and exposure questions

The current feed maps Unknown/Newsletters (generic). Check affected ranges and fixed versions before updating.

Recommended response

1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/Newsletters.
2. 2Review the reported fix. Update Unknown/Newsletters to 4.16 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

1. Published upstream

   Aug 8, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

2. Source modified

   Aug 26, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

3. First seen by HOL

   Aug 8, 2026

Sources and claim methodology

• Source referencewpscan.com

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