Security readout for executives and security teams
Plain-English summary
CVE-2026-1275 is a stored cross-site scripting issue in the WordPress plugin Multi Post Carousel by Category through version 1.4. A logged-in user with Contributor-level access or higher could place malicious script in the plugin’s slides shortcode attribute. The script runs when someone views the affected page, creating risk to site users and administrators.
Executive priority
Treat as a moderate-priority web risk. It is not reported as actively exploited in the supplied sources, but it can let a low-privileged site account plant persistent script. Prioritize sites with many content contributors, public-facing traffic, or administrator visits to contributor-created pages.
Technical view
The issue is CWE-79 in the post_slides_shortcode function. Public sources attribute it to insufficient sanitization and output escaping of the user-controlled slides shortcode parameter. 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 using Multi Post Carousel by Category versions up to and including 1.4, where untrusted or lower-privileged users can create or edit content containing shortcodes. Sites without this plugin, or without Contributor-level untrusted accounts, are less exposed.
Exploitation context
The CVE record and Wordfence reference describe authenticated stored XSS. The provided data does not indicate CISA KEV listing or confirmed active exploitation. The attacker needs valid Contributor-level or higher access, but successful injection can affect later visitors to the page.
Researcher notes
The source bundle names the vulnerable sink as the slides shortcode attribute handled by post_slides_shortcode, with code references at line 174 in trunk and tag 1.4. The affected-version metadata appears inconsistent, so rely on the narrative statement: all versions up to and including 1.4.
Mitigation direction
- Check vendor and WordPress plugin guidance for an updated fixed version or official remediation.
- Disable or remove the plugin if it is not business-critical.
- Restrict Contributor and higher content-editing access to trusted users only.
- Review posts and pages using the slides shortcode for suspicious content.
- Apply standard WordPress hardening and least-privilege account controls.
Validation and detection
- Inventory WordPress sites for the Multi Post Carousel by Category plugin.
- Confirm installed plugin version; prioritize versions up to and including 1.4.
- Identify users with Contributor-level or higher permissions.
- Review content containing the slides shortcode attribute.
- Monitor for unexpected script execution reports on affected pages.
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-2026-1275 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/b27ecbf7-e97d-42c0-98d4-c235edf40669?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/multi-post-carousel/trunk/multi-post-carousel.php#L174CVE reference
- https://plugins.trac.wordpress.org/browser/multi-post-carousel/tags/1.4/multi-post-carousel.php#L174CVE 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.