Security readout for executives and security teams
Plain-English summary
Perfmatters for WordPress before version 2.2.0 has a stored cross-site scripting issue. A low-privileged authenticated user may be able to save malicious script content that later runs when another user views affected output. This is a moderate business risk for WordPress sites with multiple contributors or shared administrative access.
Executive priority
Treat this as a timely WordPress plugin update, not a confirmed emergency. Prioritize internet-facing or multi-user WordPress sites first, because stored XSS can affect administrator sessions and site trust if triggered.
Technical view
CVE-2023-47877 is CWE-79 stored XSS in Perfmatters before 2.2.0. The CVSS 3.1 score is 6.5 with network attack vector, low complexity, low privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress installations running the Perfmatters plugin earlier than 2.2.0. Risk is higher where untrusted or lightly trusted users have WordPress accounts, plugin-related access, or content/settings permissions.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not listed as KEV. The CVSS vector indicates exploitation requires low privileges and user interaction, so this is not described as unauthenticated drive-by compromise.
Researcher notes
Evidence identifies the vulnerability class, affected version boundary, CVSS vector, and Patchstack advisory. The provided bundle does not include the vulnerable parameter, exploit details, or compensating controls, so validation should focus on version exposure and suspicious stored content.
Mitigation direction
- Inventory WordPress sites using the Perfmatters plugin.
- Update Perfmatters to version 2.2.0 or later.
- Restrict low-privileged WordPress accounts until remediation is complete.
- If updating is blocked, check Perfmatters or Patchstack guidance.
- Review recently modified settings or content after patching.
Validation and detection
- Confirm installed Perfmatters versions are 2.2.0 or newer.
- Verify no site is running Perfmatters below 2.2.0.
- Review WordPress roles with contributor or plugin-related access.
- Check recent changes for unexpected script content.
- Track remediation evidence per affected WordPress instance.
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-2023-47877 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/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.