Security readout for executives and security teams
Plain-English summary
This affects the WordPress Related Posts Widget with Thumbnails plugin through version 1.2. A crafted request could abuse a logged-in user’s browser to save malicious script content, which later runs for visitors or administrators. The issue is high severity, but the supplied sources do not confirm active exploitation or a fixed release.
Executive priority
Treat this as a high-priority WordPress plugin exposure review. The business risk is site compromise through stored browser-executed script, especially on public marketing sites. Prioritize internet-facing sites and administrator-heavy environments, but avoid claiming emergency exploitation without stronger evidence.
Technical view
CVE-2025-31570 is a CSRF vulnerability in advanced-css3-related-posts-widget that can lead to stored XSS. The CVSS 3.1 score is 7.1 with network attack vector, low complexity, required user interaction, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to WordPress sites running wp-buy Related Posts Widget with Thumbnails, package advanced-css3-related-posts-widget, at version 1.2 or earlier. Sites not using this plugin are not indicated as affected by the supplied sources.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed exploitation in the wild. The vulnerability requires user interaction, consistent with CSRF. Impact depends on whether an attacker can cause an authenticated site user to submit a malicious request that stores script content.
Researcher notes
Evidence identifies CSRF to stored XSS, not a standalone unauthenticated XSS path. Patch or fixed-version details are not present in the supplied bundle. Validate affected status carefully because the affected-version metadata is inconsistent, while the description states through version 1.2.
Mitigation direction
- Inventory WordPress sites for advanced-css3-related-posts-widget installations.
- Identify whether installed versions are 1.2 or earlier.
- Check Patchstack and vendor guidance for fixed versions or official remediation.
- Disable or remove the plugin if no safe maintained version is available.
- Review administrative hardening for CSRF and stored XSS risk reduction.
Validation and detection
- Confirm plugin presence and version from WordPress inventory or plugin files.
- Verify whether any affected site depends on the plugin’s widget functionality.
- Review recent plugin setting changes for unexpected script-like content.
- Check web and admin logs for unusual plugin configuration activity.
- Document remediation status for each WordPress property.
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-352: 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-2025-31570 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
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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.