Security readout for executives and security teams
Plain-English summary
CVE-2026-0549 affects the WordPress Groups plugin up to and including 3.10.0. A logged-in user with Contributor or higher permissions could store malicious script through a plugin shortcode. That script may run when others view the affected page. This is mainly a risk for sites allowing multiple or semi-trusted content contributors.
Executive priority
Treat as a moderate priority for WordPress environments with many contributors, customer-managed content, or weak account controls. Prioritize patch tracking and role review, but current sources do not support emergency response for active exploitation.
Technical view
The issue is stored cross-site scripting in the Groups plugin's 'groups_group_info' shortcode. Sources attribute it to insufficient sanitization and output escaping of user-supplied shortcode attributes. CVSS is 6.4, with low privileges required, network access, low complexity, changed scope, and limited confidentiality and integrity impact.
Likely exposure
Exposure is likely on WordPress sites running Groups plugin versions up to 3.10.0 where Contributor-level or higher accounts are available to untrusted or compromised users. Single-admin sites with tightly controlled accounts have lower practical exposure.
Exploitation context
No active exploitation is indicated by KEV or the provided sources. Exploitation requires authenticated access at Contributor level or above and content placement using the vulnerable shortcode. Stored XSS can affect administrators or visitors who view injected content.
Researcher notes
The public record identifies CWE-79 and points to Wordfence, a vulnerable code location, and a WordPress plugin changeset. The exact fixed plugin version is not explicitly provided in the bundle, so remediation should be tied to vendor-confirmed release guidance.
Mitigation direction
- Identify all WordPress sites using the Groups plugin.
- Check whether installed versions are 3.10.0 or earlier.
- Review vendor and WordPress plugin guidance for the fixed release.
- Update the plugin when a fixed version is available from official sources.
- Limit Contributor and higher roles to trusted users only.
- Review recent content using the 'groups_group_info' shortcode.
Validation and detection
- Confirm the Groups plugin version on each WordPress site.
- List users with Contributor, Author, Editor, or Administrator roles.
- Search site content for 'groups_group_info' shortcode usage.
- Review suspicious recent edits by lower-privileged content users.
- Verify the vendor changelog or referenced changeset is present after updating.
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-2026-0549 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/75000e67-7914-43af-be1d-82990ada5129?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/groups/tags/3.9.0/lib/views/class-groups-shortcodes.php?marks=185#L185CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3438974%40groups&new=3438974%40groups&sfp_email=&sfph_mail=#file39CVE 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.