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CVE-2016-20083 henrikmelin CVE debrief

CVE-2016-20083 is a cross-site request forgery vulnerability in WordPress More Fields Plugin 2.1. The vulnerability allows attackers to perform unauthorized actions by disabling CSRF token validation. Attackers can craft malicious web pages that trick logged-in administrators into adding or deleting custom fields and boxes on the Write/Edit page via POST and GET requests to the options-general.php endpoint.

Vendor
henrikmelin
Product
More Fields
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Administrators of WordPress sites using the More Fields Plugin 2.1 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability has a CVSS score of 6.9 and a severity of MEDIUM. The CVSS vector is CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to a patched version of the More Fields Plugin if available.
  • Implement additional security measures such as CSRF token validation.

Evidence notes

The vulnerability was reported by an unknown vendor and has a low confidence level.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-20083 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-20083

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2016-20083 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-20083

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.