Security readout for executives and security teams
Plain-English summary
RAYS Grid for WordPress allowed a malicious site to cause an administrator’s browser to update post fields if the administrator clicked a crafted link or took a similar action. The impact is limited to integrity, but it can still affect published content on exposed WordPress sites using vulnerable plugin versions.
Executive priority
Treat this as a moderate WordPress hygiene issue. It is not known to be actively exploited from the provided sources, but vulnerable sites should be updated or retired because administrator interaction can still lead to unauthorized content modification.
Technical view
CVE-2021-4423 is a CSRF issue in RAYS Grid up to and including 1.2.2. The rsgd_insert_update() function had missing or incorrect nonce validation, allowing forged unauthenticated requests to update post fields when an authenticated administrator is induced to act.
Likely exposure
Exposure is limited to WordPress sites with the RAYS Grid plugin installed at vulnerable versions. The bundle identifies versions up to 1.2.2, but affected metadata also appears incomplete or inconsistent, so inventory validation matters.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires administrator interaction and an active authenticated session, which lowers urgency compared with remotely exploitable unauthenticated flaws.
Researcher notes
Primary evidence points to CWE-352 CSRF from missing or incorrect nonce checks in rsgd_insert_update(). The CVE affected-product metadata is sparse, so validate against Wordfence, WordPress plugin history, and the referenced changeset rather than assuming broad product scope.
Mitigation direction
- Inventory WordPress sites for the RAYS Grid plugin and installed version.
- Update beyond version 1.2.2 if vendor guidance provides a fixed release.
- Remove or disable RAYS Grid where it is unnecessary or unsupported.
- Review vendor and WordPress.org guidance before relying on compensating controls.
Validation and detection
- Confirm whether RAYS Grid is present on production, staging, or legacy WordPress sites.
- Check plugin version and flag installations at or below 1.2.2.
- Review whether rsgd_insert_update() includes proper WordPress nonce validation.
- Audit recent post field changes if a vulnerable administrator workflow was exposed.
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-2021-4423 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/e5911815-db53-46f2-a16d-ed21be20bbfb?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://plugins.trac.wordpress.org/changeset/2572600/rays-grid/trunk/includes/class-db.phpCVE 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.