Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in elfsight Elfsight Testimonials Slider elfsight-testimonials-slider allows Stored XSS.This issue affects Elfsight Testimonials Slider: from n/a through <= 1.0.1.
Security readout for executives and security teams
Plain-English summary
CVE-2025-31587 is a stored cross-site scripting issue in the WordPress Elfsight Testimonials Slider plugin through version 1.0.1. A highly privileged user could save unsafe content that later runs in another user’s browser. The available sources rate it medium severity, not a broad unauthenticated compromise.
Executive priority
Treat this as a targeted WordPress plugin hygiene issue. Prioritize internet-facing sites using this plugin, especially where many administrators or editors exist. It should be remediated in normal vulnerability management cycles unless local evidence shows suspicious content changes.
Technical view
The CVE describes CWE-79 improper input neutralization during web page generation in elfsight-testimonials-slider. CVSS 3.1 is 5.9 with network access, low complexity, high privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress sites that installed Elfsight Testimonials Slider version 1.0.1 or earlier. The source bundle does not identify affected fields, required WordPress roles, or whether a fixed version exists.
Exploitation context
The source bundle does not report active exploitation, and the CVE is not marked in KEV. The CVSS vector indicates exploitation requires high privileges and a victim interaction path, reducing urgency compared with unauthenticated XSS.
Researcher notes
The public bundle confirms stored XSS but lacks vulnerable parameter details, patch availability, exploit proof, and role mapping beyond CVSS PR:H. Avoid assuming unauthenticated exploitation or a specific fix. Validate exposure through asset inventory and vendor advisory checks.
Mitigation direction
Inventory WordPress sites for elfsight-testimonials-slider and record installed versions.
Check vendor or Patchstack guidance for a fixed release or official workaround.
Disable or remove the plugin where it is unused or cannot be updated.
Restrict high-privilege WordPress accounts to trusted users only.
Review administrator-created testimonial content for unexpected scripts or unsafe HTML.
Validation and detection
Confirm whether any site runs Elfsight Testimonials Slider version 1.0.1 or earlier.
Verify plugin status against CVE and Patchstack records.
Review WordPress role assignments for users able to edit plugin-managed content.
In authorized staging only, verify saved testimonial content is safely escaped on render.
Check security monitoring for suspicious content changes in affected areas.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
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 · medium confidence lookup
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.
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.
We 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.
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE-79 · source CWE mapping
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.