Security readout for executives and security teams
Plain-English summary
CVE-2023-1027 affects the WP Meta SEO WordPress plugin through version 4.5.3. A logged-in low-privilege user, such as a subscriber, could trigger sitemap category handling that should have required stronger authorization. The known impact is limited, but it can expose or alter sitemap-related category information beyond the user’s intended role.
Executive priority
Treat this as a routine but real WordPress hardening item. It is not a crisis based on current evidence, but affected sites with untrusted users should be updated promptly because the flaw bypasses role-based authorization.
Technical view
The issue is missing authorization, CWE-862, in checkAllCategoryInSitemap. The plugin relied on nonce validation as access control, but the nonce was available to all authenticated users regardless of role. CVSS 3.1 is 4.3, with network access, low complexity, low privileges, no user interaction, unchanged scope, and low integrity impact.
Likely exposure
Exposure is limited to WordPress sites running WP Meta SEO versions up to and including 4.5.3 with authenticated user accounts. Public anonymous exploitation is not supported by the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The described attacker needs an authenticated account with subscriber-level access. The practical risk rises on sites allowing open registration or many untrusted low-privilege users.
Researcher notes
Evidence identifies a missing capability check in checkAllCategoryInSitemap and a WordPress Trac changeset related to the issue. The provided data does not include exploit proof, mass exploitation, or a named fixed release, so remediation should follow current vendor guidance.
Mitigation direction
- Inventory WordPress sites for WP Meta SEO and record installed versions.
- Update WP Meta SEO according to vendor or WordPress plugin guidance.
- Restrict or review subscriber-level access on affected WordPress sites.
- Disable the plugin if exposure is unacceptable and no safe update is available.
Validation and detection
- Confirm no site runs WP Meta SEO 4.5.3 or earlier.
- Review whether public user registration grants subscriber accounts.
- Verify patched code enforces capability checks, not only nonce checks.
- Check sitemap category behavior in staging with a low-privilege account.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2023-1027 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:L/UI:N/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:L/UI:N/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:L/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4f589e21-7417-4b43-b580-4f1d3c2041f4?source=cveCVE reference
- https://plugins.trac.wordpress.org/changeset/2870465/wp-meta-seo/trunk?contextall=1&old=2869205&old_path=%2Fwp-meta-seo%2Ftrunk#file2CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2870465%40wp-meta-seo&new=2870465%40wp-meta-seo&sfp_email=&sfph_mail=CVE reference
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4f589e21-7417-4b43-b580-4f1d3c2041f4CVE reference · x_transferred
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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.