Security readout for executives and security teams
Plain-English summary
This CVE affects WordPress sites running the Perfmatters performance plugin through version 2.1.6. A reflected cross-site scripting flaw could let an attacker trick a user into opening a crafted link that runs unwanted script in the browser. The source bundle does not show confirmed exploitation or a named fixed version.
Executive priority
Treat this as a high-priority web application hygiene issue if Perfmatters is deployed. It is not evidenced as actively exploited here, but XSS in WordPress plugins can create account, trust, and site-integrity risk.
Technical view
CVE-2023-47876 is a CWE-79 reflected XSS issue in Perfmatters through 2.1.6. The CVSS 3.1 score is 7.1 with network attack vector, low complexity, no privileges required, and required user interaction. Scope is changed, with low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress deployments with the Perfmatters plugin installed at version 2.1.6 or earlier. Sites without Perfmatters, or not within the affected range, are not indicated as affected by the provided sources.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source confirms active exploitation. Practical abuse depends on user interaction, typically persuading a target to visit a maliciously crafted request affecting a vulnerable site.
Researcher notes
The public bundle identifies reflected XSS but does not include vulnerable parameters, proof of concept, exploit telemetry, or fixed-version details. Validation should stay non-invasive and focus on asset inventory, version confirmation, and vendor advisory tracking.
Mitigation direction
- Inventory WordPress sites for the Perfmatters plugin and installed version.
- Prioritize moving any Perfmatters deployment off version 2.1.6 or earlier.
- Check Perfmatters and Patchstack guidance for the fixed release or vendor mitigation.
- Use compensating controls for suspicious script injection patterns until remediation is confirmed.
Validation and detection
- Confirm whether Perfmatters is installed on each WordPress property.
- Record the plugin version and flag any instance at 2.1.6 or earlier.
- Review vendor and Patchstack records for current remediation guidance.
- Check web and security logs for unusual requests targeting Perfmatters-related paths or parameters.
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-79: 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-2023-47876 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
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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:C/C:L/I:L/A:L2.83.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source materials
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.