Security readout for executives and security teams
Plain-English summary
CVE-2021-4370 affects the uListing WordPress plugin through version 1.6.6. The sources describe missing authorization across many actions and endpoints, allowing unauthenticated people to perform administrative actions. For a public WordPress site, this can threaten confidentiality, integrity, and availability.
Executive priority
Treat this as urgent for any site running affected uListing versions. The issue can allow unauthenticated administrative actions on a public website, creating business risk around defacement, data exposure, service disruption, and trust damage.
Technical view
The issue is CWE-862 missing authorization in Stylemix uListing. The CVE record assigns CVSS 3.1 score 9.8, network exploitable, low complexity, no privileges, and no user interaction. The bundle says endpoints lack authorization, nonces, and frequent validation, enabling unauthenticated administrative operations.
Likely exposure
Exposure is likely limited to WordPress sites with the Directory Listings WordPress plugin uListing installed at version 1.6.6 or earlier. Public internet-facing WordPress deployments are the highest concern because the described access requires no authentication.
Exploitation context
The provided bundle does not show CISA KEV listing or cited proof of active exploitation. However, the vulnerability characteristics are severe: unauthenticated network access, administrative impact, and high confidentiality, integrity, and availability impact.
Researcher notes
The affected-version evidence comes from the CVE description and third-party references, while the source bundle’s affected object is sparse. Do not assume active exploitation from this bundle. Focus verification on plugin presence, version, endpoint exposure, and post-compromise review.
Mitigation direction
- Upgrade uListing to the latest vendor-supported release above 1.6.6.
- Disable or remove uListing if immediate upgrade is not possible.
- Review Wordfence, Nintechnet, and WordPress.org plugin guidance for fixed release details.
- Back up the site before plugin remediation or restoration work.
- Investigate unexpected listing, settings, user, or content changes.
Validation and detection
- Inventory all WordPress sites for uListing installation and version.
- Confirm no site runs uListing 1.6.6 or earlier.
- Review web and WordPress logs for unauthenticated uListing-related requests.
- Check administrative settings and listing content for unauthorized changes.
- Compare installed plugin state with WordPress.org repository changes.
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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-4370 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c5ada976-03b8-4219-9ae3-9060fb7b9de5?source=cveCVE reference
- https://blog.nintechnet.com/wordpress-ulisting-plugin-fixed-multiple-critical-vulnerabilities/CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2456786%40ulisting&new=2456786%40ulisting&sfp_email=&sfph_mail=CVE 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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.