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High 8.1Published Aug 8, 2026
CVE-2026-16267Newsletters < 4.16 - Unauthenticated PHP Object Injection via Date Form Field
Updated under an hour ago ()
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It affects Unknown Newsletters. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The Newsletters WordPress plugin before 4.16 does not restrict the classes allowed when unserialising a value taken from a public form submission, allowing unauthenticated attackers to inject arbitrary PHP objects.
- CVSS
- 8.1 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-502
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- WPScan
- NVD analysis
- Deferred
- Record last updated
- Aug 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Unknown Newsletters unknown:newsletters (from the name) | before 4.16 | CNA record |
References
- https://wpscan.com/vulnerability/b51c11d6-5bfa-4b2c-b348-cda19889deee/exploit, vdb-entry, technical-description
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.