Security readout for executives and security teams
Plain-English summary
CVE-2026-1910 affects the UpMenu WordPress plugin used for restaurant online ordering. A logged-in user with Contributor-level access or higher can store malicious script through the plugin shortcode. The script can run when someone views the affected page, creating risk of account compromise or unauthorized actions in the browser.
Executive priority
Treat as a moderate-priority web application issue. It is not unauthenticated remote compromise, but it can become serious on sites with many content contributors or compromised user accounts. Prioritize restaurants or ordering sites where WordPress accounts are broadly shared.
Technical view
The issue is stored cross-site scripting in the 'lang' attribute of the 'upmenu-menu' shortcode in UpMenu versions up to and including 3.1. Sources attribute it to insufficient input sanitization and output escaping. CVSS 3.1 is 6.4 with low privileges required, network attack vector, changed scope, and low confidentiality and integrity impact.
Likely exposure
WordPress sites using the UpMenu plugin at version 3.1 or earlier are the relevant exposure. Risk depends on whether untrusted or lower-privileged users can create or edit content containing the UpMenu shortcode.
Exploitation context
The CVE requires authenticated access at Contributor level or higher. The provided sources do not indicate public exploitation, and the CVE is not marked in KEV. This is most urgent where many users can submit content or where contributor accounts are weakly controlled.
Researcher notes
The source bundle identifies CWE-79 and points to WordPress plugin code locations for the shortcode handling. No exploit instructions, patch commit, or fixed version are provided in the supplied sources. The affected-version statement comes from the CVE description: all versions up to and including 3.1.
Mitigation direction
- Inventory WordPress sites for the UpMenu plugin and installed version.
- Check vendor, WordPress plugin, or Wordfence guidance for a fixed version or official mitigation.
- Restrict Contributor and higher roles to trusted users until resolved.
- Review pages and posts using the 'upmenu-menu' shortcode.
- Remove suspicious shortcode attributes or content after appropriate review.
- Apply any vendor-provided update when available.
Validation and detection
- Confirm whether UpMenu is installed on each WordPress site.
- Record the installed plugin version and compare against 3.1 or earlier.
- Identify users with Contributor, Author, Editor, or Administrator roles.
- Search content for pages or posts using the 'upmenu-menu' shortcode.
- Review logs or content history for unexpected edits by lower-privileged accounts.
- Verify remediation against official vendor or Wordfence 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-2026-1910 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/bbb9483b-ee00-4e40-8fa3-eefbbfeb9516?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/upmenu/trunk/upmenu.php#L720CVE reference
- https://plugins.trac.wordpress.org/browser/upmenu/tags/3.1/upmenu.php#L720CVE 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.