Security readout for executives and security teams
Plain-English summary
CVE-2026-1236 affects the Envira Gallery WordPress plugin through version 1.12.3. A logged-in user with Author-level access or higher could save malicious script content that runs when others view the affected page. This is most urgent for WordPress sites that allow many content authors or untrusted contributors.
Executive priority
Treat as a medium-priority remediation. Prioritize internet-facing WordPress sites with multiple authors, agencies, contributors, or weak account governance. This is not currently supported by the sources as an actively exploited emergency.
Technical view
The issue is stored cross-site scripting in the 'justified_gallery_theme' parameter, reachable via the REST API. The root cause is insufficient input sanitization and output escaping. CVSS 3.1 is 6.4, with network attack vector, low complexity, low privileges required, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to WordPress sites running Envira Gallery through 1.12.3 where attackers can obtain Author-level or higher accounts. Sites with tightly controlled admin and author accounts face lower practical risk.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires authenticated Author-level access or above, but successful injection can affect later visitors to the injected page.
Researcher notes
The CVE and Wordfence describe authenticated stored XSS via 'justified_gallery_theme'. WordPress Trac references point to shortcode code and a related changeset, but the source bundle does not clearly name a fixed release. Avoid assuming exploit availability or a precise patch version beyond versions through 1.12.3 being affected.
Mitigation direction
- Identify WordPress sites using Envira Gallery and record installed versions.
- Update Envira Gallery to the latest available version after checking vendor guidance.
- If update is delayed, restrict Author-level access to trusted users only.
- Review and remove unnecessary WordPress accounts with Author privileges or higher.
- Monitor vendor and Wordfence advisories for confirmed fixed-version details.
Validation and detection
- Check whether Envira Gallery is installed and version is 1.12.3 or older.
- Review WordPress users with Author, Editor, or Administrator roles.
- Inspect Envira gallery/page content for unexpected script-like entries or suspicious theme values.
- Confirm the plugin has been updated and no vulnerable version remains.
- Review security logs for unusual authenticated REST API activity involving gallery 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-2026-1236 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/bc552d46-79ca-4540-8620-5a031238cd62?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/envira-gallery-lite/trunk/includes/global/shortcode.php#L302CVE reference
- https://plugins.trac.wordpress.org/browser/envira-gallery-lite/tags/1.12.3/includes/global/shortcode.php#L302CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3465371%40envira-gallery-lite&old=3444965%40envira-gallery-lite&sfp_email=&sfph_mail=CVE 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.