Security readout for executives and security teams
Plain-English summary
CVE-2025-31621 is a stored cross-site scripting issue in the WordPress byBrick Accordion plugin up to version 1.0. A lower-privileged user could store unsafe content that later runs in another user's browser. The source bundle does not show active exploitation or a confirmed fixed version.
Executive priority
Treat this as a moderate web application risk. Prioritize internet-facing WordPress sites, especially where non-admin users can edit content. The main business concern is browser-based compromise, session abuse, or reputational impact from malicious content displayed through trusted pages.
Technical view
The issue is CWE-79 improper neutralization during web page generation in bybrick-accordion. CVSS 3.1 is 6.5 with network access, low complexity, low privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to WordPress sites that have davidpaulsson byBrick Accordion installed at version 1.0 or earlier. Sites not using this plugin are not indicated as affected by the provided sources.
Exploitation context
The CVE is not marked as KEV, and the provided sources do not state active exploitation. The attack requires privileges and user interaction, but stored XSS can still affect administrators or site visitors who view affected content.
Researcher notes
Evidence is sparse beyond the CVE metadata and Patchstack reference. Do not assume a patch, exploit, or broader product impact from the provided bundle. Validate exposure through asset inventory and plugin version data, then track authoritative advisories for remediation specifics.
Mitigation direction
- Inventory WordPress sites for the bybrick-accordion plugin and installed version.
- Check vendor or Patchstack guidance for a fixed release or official mitigation.
- Remove or disable the plugin where it is unused or cannot be safely updated.
- Restrict plugin content editing to trusted users until remediation is confirmed.
- Review affected pages for unauthorized or unexpected embedded content.
Validation and detection
- Confirm whether bybrick-accordion is installed on each WordPress site.
- Record installed versions and flag version 1.0 or earlier for review.
- Inspect accordion content for unexpected scripts or unauthorized edits.
- Review WordPress user roles with permission to edit plugin content.
- Monitor vendor, CVE, and Patchstack entries for updated remediation details.
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-2025-31621 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.