Security readout for executives and security teams
Plain-English summary
A WordPress plugin used to display related posts can store unsafe input that later runs script in a visitor or administrator browser. The business risk is moderate: compromise depends on plugin presence, attacker privileges, and user interaction, but successful abuse could affect site integrity, confidentiality, and availability at a limited level.
Executive priority
Treat this as a moderate-priority web risk. It is not evidenced as actively exploited, but affected public WordPress sites should be inventoried and remediated promptly because stored XSS can undermine site trust and user sessions when the vulnerable plugin is present.
Technical view
CVE-2023-51666 is a stored cross-site scripting issue in PickPlugins Related Post through version 2.0.53. The CVSS 3.1 score is 6.5 with network access, low complexity, low privileges required, user interaction required, and changed scope. The source bundle identifies CWE-79 but does not include vulnerable field details or a fixed version.
Likely exposure
Exposure is likely limited to WordPress sites running PickPlugins Related Post, package related-post, at version 2.0.53 or earlier. Risk depends on whether low-privileged users can submit or control affected plugin content and whether other users view that stored content.
Exploitation context
The source bundle does not show active exploitation, and this CVE is not listed as KEV. Public evidence supports stored XSS only. Exploitation would require a low-privileged attacker and a user viewing affected generated content; no exploit details are provided in the supplied sources.
Researcher notes
The CVSS vector supports authenticated, low-complexity stored XSS with user interaction and changed scope. Evidence is incomplete for the exact sink, vulnerable parameter, proof of concept, and fixed version. Avoid assuming exploit availability or patch status beyond the cited sources.
Mitigation direction
- Inventory WordPress sites for PickPlugins Related Post installations.
- Identify any installation running version 2.0.53 or earlier.
- Check vendor and Patchstack guidance for a fixed version or official workaround.
- Disable the plugin on high-risk sites if no safe update is available.
- Restrict low-privileged content or plugin access until remediation is confirmed.
Validation and detection
- Confirm plugin package name related-post and installed version on each WordPress site.
- Review whether untrusted or low-privileged users can influence related post content.
- Check vendor advisories for fixed-version confirmation before closing remediation.
- Review recent site content changes for unexpected script-bearing entries.
- Verify the plugin is updated, disabled, or removed after remediation.
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-2023-51666 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.