Security readout for executives and security teams
Plain-English summary
CVE-2025-31819 is a stored or reflected web-page output weakness in the WordPress Nova Blocks plugin by Pixelgrade. A site running Nova Blocks through version 2.1.8 may allow cross-site scripting, potentially letting an attacker affect users who interact with crafted content. The available sources do not confirm active exploitation.
Executive priority
Treat this as a timely WordPress hygiene issue, not an emergency based on current evidence. Prioritize internet-facing or multi-author sites first because the CVSS vector requires low privileges and user interaction, but no active exploitation is cited.
Technical view
The CVE describes CWE-79 improper neutralization during web page generation in nova-blocks through 2.1.8. CVSS 3.1 is 6.5: network reachable, low complexity, low privileges required, user interaction required, changed scope, and low confidentiality, integrity, and availability impacts.
Likely exposure
Exposure is limited to WordPress installations with Pixelgrade Nova Blocks installed and at version 2.1.8 or earlier. The bundle does not provide CPEs, affected themes, vulnerable fields, or exploit preconditions beyond the CVSS vector.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation is plausible where a low-privileged user can submit plugin-controlled content and another user interacts with the resulting page.
Researcher notes
Available public data is sparse. The bundle identifies product, version boundary, CWE, CVSS, and Patchstack entry, but not the vulnerable parameter, proof of concept, fixed version, or detailed remediation. Avoid assuming exploit status or patch availability without vendor confirmation.
Mitigation direction
- Identify WordPress sites using Nova Blocks and record installed versions.
- Check Pixelgrade or Patchstack guidance for a fixed version or vendor workaround.
- Update Nova Blocks if a vendor-supported fixed release is available.
- Disable or remove the plugin where it is unnecessary or cannot be updated.
- Restrict content-editing privileges to trusted users until remediation is complete.
Validation and detection
- Verify whether Nova Blocks is installed on each WordPress site.
- Confirm whether the installed version is 2.1.8 or earlier.
- Review who can create or edit content using Nova Blocks.
- Check web application logs for suspicious content-editing activity.
- Retest after update or removal to confirm the vulnerable version is absent.
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-2025-31819 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.
SSVC decision data
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:L2.33.7PatchstackVulnerability 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://patchstack.com/database/Wordpress/Plugin/nova-blocks/vulnerability/wordpress-nova-blocks-by-pixelgrade-plugin-2-1-8-cross-site-scripting-xss-vulnerability?_s_id=cveCVE reference, Patchstack · vdb-entry
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.