Security readout for executives and security teams
Plain-English summary
CVE-2026-0557 affects the WP Data Access WordPress plugin through version 5.5.63. A logged-in user with Contributor or higher permissions could store malicious script in content using the plugin’s wpda_app shortcode. That script may run when someone views the affected page, creating account and site-integrity risk.
Executive priority
Treat as a timely WordPress plugin update, especially on sites with multiple content contributors. Priority rises if outside parties, contractors, or lightly managed accounts can publish or edit content.
Technical view
This is stored cross-site scripting caused by insufficient sanitization and output escaping of user-supplied wpda_app shortcode attributes. The CVSS 3.1 score is 6.4, with low privileges required and changed scope. The public record points to version 5.5.64 source as relevant to the fix context.
Likely exposure
Exposure is limited to WordPress sites running WP Data Access versions up to and including 5.5.63, where untrusted or compromised Contributor-level accounts can create or edit content using the shortcode.
Exploitation context
No CISA KEV listing or provided source indicates active exploitation. Practical abuse requires authenticated WordPress access at Contributor level or higher. Impact is typical stored XSS: script execution in viewers’ browsers, potentially affecting sessions, content integrity, or administrative workflows.
Researcher notes
The provided data identifies CWE-79 and the vulnerable shortcode path, but does not include a detailed advisory narrative beyond Wordfence and the CVE text. Avoid assuming broader product impact or confirmed exploitation without additional vendor or telemetry evidence.
Mitigation direction
- Update WP Data Access to 5.5.64 or later if available from the vendor.
- Restrict Contributor and higher roles to trusted users only.
- Review content containing the wpda_app shortcode for suspicious attributes.
- Check Wordfence and plugin vendor guidance for final remediation details.
Validation and detection
- Inventory WordPress sites using the WP Data Access plugin.
- Confirm installed plugin versions are above 5.5.63.
- List users with Contributor, Author, Editor, or Administrator roles.
- Review pages and posts using the wpda_app shortcode.
- Check security logs for suspicious content edits by authenticated users.
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-2026-0557 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
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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:N/S:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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.