Security readout for executives and security teams
Plain-English summary
CVE-2020-36755 affects the Customizr WordPress theme up to version 4.3.0. It can let an attacker trick a logged-in administrator into submitting unintended theme-related field changes. This is not a server takeover issue in the provided sources, but it can alter site integrity if administrators are targeted.
Executive priority
Treat this as a routine but real website integrity issue. Prioritize remediation for public WordPress sites using Customizr, especially business-critical sites, but it does not warrant emergency response absent exploitation evidence.
Technical view
The issue is CWE-352 CSRF caused by missing or incorrect nonce validation in czr_fn_post_fields_save(). The CVSS 3.1 score is 4.3 with network attack vector, no privileges required, required user interaction, and low integrity impact only.
Likely exposure
Exposure is limited to WordPress sites with the Customizr theme installed at version 4.3.0 or earlier, especially where administrators browse while authenticated. The source bundle has sparse affected-product metadata, so confirm theme presence and version directly.
Exploitation context
The sources describe a forged-request scenario requiring administrator interaction, such as clicking a link. KEV is false, and no cited source in the bundle establishes active exploitation in the wild.
Researcher notes
The key evidence is missing or incorrect nonce validation in czr_fn_post_fields_save(). The impact is constrained to integrity, with administrator interaction required. A WordPress Trac reference to Customizr 4.3.1 suggests reviewing that release, but confirm through vendor guidance.
Mitigation direction
- Upgrade Customizr to a vendor-supported fixed release newer than 4.3.0.
- Check Wordfence, Nintechnet, and vendor guidance for fixed-version confirmation.
- Limit administrator browsing while logged into WordPress until upgraded.
- Review admin accounts and recent theme-setting changes for unexpected modifications.
Validation and detection
- Inventory WordPress sites for the Customizr theme.
- Confirm whether installed Customizr versions are 4.3.0 or earlier.
- Verify the installed release includes nonce validation for czr_fn_post_fields_save().
- Review logs or change history for unexpected administrator-initiated field updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-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 lookupCVE-2020-36755 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/d9f6b600-a35a-49c2-8758-a7cc5c00e947?source=cveCVE reference
- https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/CVE reference
- https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/CVE reference
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/CVE reference
- https://themes.trac.wordpress.org/browser/customizr/4.3.1/core/czr-admin-ccat.php?rev=135570#L1764CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
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.