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CVE Record

CVE-2020-36742: Custom Field Template <= 2.5.1 - Cross-Site Request Forgery Bypass

The Custom Field Template plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.5.1. This is due to missing or incorrect nonce validation on the edit_meta_value() function. This makes it possible for unauthenticated attackers to edit meta field values via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

MediumCVSS 4.3Not KEV-listedUpdated
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A WordPress plugin used to manage custom fields could let an attacker change meta field values if they trick an administrator into taking an action. The impact is limited to integrity of stored content or metadata, not direct data theft or server takeover based on the supplied sources.

Executive priority

Treat as a routine but real integrity issue. Prioritize remediation on public or business-critical WordPress sites where content changes could affect trust, SEO, forms, or operational workflows.

Technical view

Custom Field Template for WordPress through version 2.5.1 lacks proper nonce validation in edit_meta_value(), creating a CSRF condition. Attackers need no account, but need administrator interaction. CVSS is 4.3 with low integrity impact and no confidentiality or availability impact stated.

Likely exposure

Exposure is limited to WordPress sites running Custom Field Template version 2.5.1 or older, especially where administrators are logged in and can be targeted by malicious links or pages.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires social engineering an administrator, so risk is lower than unauthenticated direct compromise but still relevant for content integrity.

Researcher notes

The affected-data block in the bundle is sparse, but the narrative states Custom Field Template through 2.5.1 is vulnerable. Avoid claiming active exploitation. Focus validation on version inventory, admin interaction exposure, and whether nonce validation was added in the referenced WordPress changeset.

Mitigation direction

  • Inventory WordPress sites for Custom Field Template installations.
  • Update or remove versions 2.5.1 and older using vendor guidance.
  • Restrict administrator browsing from logged-in WordPress sessions where practical.
  • Review WordPress admin hardening and CSRF-aware operational practices.

Validation and detection

  • Confirm plugin presence and installed version across WordPress assets.
  • Verify affected versions are no longer deployed in production.
  • Review recent meta field changes for unexpected modifications.
  • Check vendor or WordPress plugin guidance for the fixed release status.
Prepared
Confidence
medium
Sources
5

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-352: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2020-36742 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
10Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N2.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.3Medium
CVSS 3.1 vector shape for CVE-2020-36742Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone
Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
hiroaki-miyashitaCustom Field Template0unaffected
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-352 · source CWE mapping

Cross-Site Request Forgery (CSRF)

Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.