Security readout for executives and security teams
Plain-English summary
This issue affects WordPress sites using the Web Application Firewall plugin through version 2.1.2. The plugin trusted client-provided IP information too broadly, so a blocked visitor could appear to come from a different address or country. The main business impact is weaker login restriction and request logging controls, not full site compromise.
Executive priority
Address during normal vulnerability remediation, faster for public WordPress sites relying on IP or country login controls. This is not evidenced as actively exploited in the bundle, but it can weaken preventive controls and incident investigation quality.
Technical view
CVE-2022-4539 is a CWE-348 IP address spoofing flaw in the WordPress Web Application Firewall plugin. Insufficient restriction on request IP source selection allowed attacker-controlled forwarded IP data to influence logging and login restriction decisions. CVSS 3.1 is 5.3, network exploitable, low complexity, no privileges or user interaction required, with limited integrity impact.
Likely exposure
Exposure is limited to WordPress deployments running Web Application Firewall plugin versions up to and including 2.1.2, especially where administrators depend on the plugin for IP blocks, country-based login blocking, or reliable request attribution.
Exploitation context
The bundle does not show CISA KEV listing or cited active exploitation. The issue is still practical because it is unauthenticated, network reachable, and targets a common trust boundary: request-origin identification behind web infrastructure.
Researcher notes
The public record identifies the vulnerable behavior and affected range but does not provide complete operational detail in the bundle. The WordPress Trac changeset is relevant to remediation analysis. Avoid assuming broader WAF bypass or authentication compromise beyond the documented IP-based protection bypass.
Mitigation direction
- Inventory WordPress sites for the affected plugin and installed version.
- Upgrade beyond version 2.1.2 if vendor guidance confirms a fixed release.
- Review plugin settings that rely on IP or country-based login restrictions.
- Check vendor and WordPress plugin guidance for any current remediation notes.
- Treat plugin logs from affected versions as potentially unreliable for source IP attribution.
Validation and detection
- Confirm whether the plugin is installed on each WordPress property.
- Record the exact installed plugin version and compare it with the affected range.
- Review whether login restrictions depend on IP address or country matching.
- Check recent security logs for inconsistent or unexpected client IP attribution.
- Verify post-remediation behavior against vendor-documented fixed handling.
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-348: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2022-4539 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
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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:N/UI:N/S:U/C:N/I:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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.
Use of Less Trusted Source
Use of Less Trusted Source represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.