Security readout for executives and security teams
Plain-English summary
CVE-2026-1904 affects the WordPress plugin Simple Wp colorfull Accordion up to version 1.0. A logged-in user with Contributor or higher privileges could store script content in an accordion title, causing it to run when someone views the affected page. This is most urgent for sites allowing untrusted or many content contributors.
Executive priority
Treat as a moderate-priority website risk. Prioritize sites with public traffic, many contributors, or untrusted content workflows. If the plugin is unused, removal is the fastest risk reduction. No public source in the bundle confirms active exploitation.
Technical view
The issue is stored cross-site scripting in the plugin’s accordion shortcode title parameter, caused by insufficient input sanitization and output escaping. CVSS is 6.4, medium, with network access, low complexity, low privileges, changed scope, and limited confidentiality and integrity impact. Public references point to the shortcode implementation around line 60 in trunk and version 1.0.
Likely exposure
Exposure is limited to WordPress sites running Simple Wp colorfull Accordion version 1.0 or earlier, especially where Contributor-level users are not fully trusted. Sites without the plugin, without vulnerable versions, or without lower-privileged content authors are less exposed.
Exploitation context
Sources describe authenticated stored XSS requiring Contributor-level access or higher. The source bundle does not indicate CISA KEV listing or confirmed active exploitation. The impact depends on who views affected pages and what privileges or sessions those viewers have.
Researcher notes
The affected-version evidence is slightly inconsistent: the description states all versions up to and including 1.0, while the affected metadata lists version 0 with default unaffected. Use the Wordfence advisory and WordPress Trac references to confirm code behavior and monitor for corrected vendor metadata.
Mitigation direction
- Inventory WordPress sites for Simple Wp colorfull Accordion and record installed versions.
- Disable or remove the plugin where it is not business-critical.
- Check WordPress.org, the plugin vendor, and Wordfence for any fixed release or guidance.
- Restrict Contributor and higher accounts to trusted users until remediation is confirmed.
- Review existing accordion shortcode content for suspicious title values.
Validation and detection
- Confirm whether the plugin is installed on each WordPress site.
- Verify whether the installed version is 1.0 or earlier.
- Identify users with Contributor, Author, Editor, or Administrator roles.
- Review pages or posts using the accordion shortcode title attribute.
- Check Wordfence and CVE records for updated affected-version or patch information.
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-2026-1904 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
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8444743c-ba57-4a51-990c-eb9058829d09?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/simple-wp-colorfull-accordion/trunk/Simple-Wp-colorfull-Accordion.php#L60CVE reference
- https://plugins.trac.wordpress.org/browser/simple-wp-colorfull-accordion/tags/1.0/Simple-Wp-colorfull-Accordion.php#L60CVE reference
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.