Security readout for executives and security teams
Plain-English summary
CVE-2026-4766 affects the Easy Image Gallery WordPress plugin through version 1.5.3. A logged-in user with Contributor-level access or higher could save malicious script in gallery shortcode metadata. That script can run when someone views the affected page, creating risk to site administrators and visitors.
Executive priority
Treat as a moderate-priority web risk. Prioritize sites with public traffic, many content contributors, or recently compromised author accounts. The issue can affect user trust and admin sessions, but current sources do not show active exploitation.
Technical view
This is a stored cross-site scripting issue in Easy Image Gallery caused by insufficient sanitization and output escaping of gallery shortcode post meta. The CVSS 3.1 score is 6.4. The attack requires authenticated Contributor+ access, is network-reachable, and can impact confidentiality and integrity through script execution in victims’ browsers.
Likely exposure
Exposure is mainly WordPress sites using Easy Image Gallery version 1.5.3 or earlier and allowing Contributor-level or higher users to create or edit content using gallery shortcodes. Sites with many untrusted authors have higher practical risk.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires a valid WordPress account with Contributor privileges or higher, reducing internet-wide exposure but increasing concern for multi-author sites or compromised author accounts.
Researcher notes
Sources identify stored XSS via gallery shortcode post meta and reference plugin code locations. The bundle does not name a fixed version. The affected metadata in the bundle appears incomplete or inconsistent, so rely on the description and vendor intelligence for scope.
Mitigation direction
- Check vendor and WordPress plugin guidance for a fixed version or official remediation.
- Update Easy Image Gallery if a patched release is available from trusted sources.
- Restrict Contributor and higher roles to trusted users only.
- Disable or remove the plugin if it is not business-critical.
- Review recent gallery shortcode content for suspicious script-like input.
Validation and detection
- Inventory WordPress sites for Easy Image Gallery installations.
- Confirm plugin version and flag 1.5.3 or earlier.
- Review user roles with Contributor, Author, Editor, or Administrator access.
- Inspect gallery shortcode post meta for unexpected script content.
- Monitor site security logs for suspicious authenticated content changes.
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-2026-4766 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/e7279f74-c2bd-4601-b8d5-0effe43705a5?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/easy-image-gallery/trunk/includes/template-functions.php#L240CVE reference
- https://plugins.trac.wordpress.org/browser/easy-image-gallery/tags/1.5.3/includes/template-functions.php#L240CVE 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.