CVE-2026-4088 json
Switch CTA Box <= 1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
published 2026-04-22 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-24652
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
The Switch CTA Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'wppw_cta_box' shortcode in all versions up to, and including, 1.1. This is due to insufficient input sanitization and output escaping on user-supplied post meta values including 'cta_box_button_link', 'cta_box_button_id', 'cta_box_button_text', and 'cta_box_description'. The shortcode reads post meta from a user-specified post ID and echoes these values directly into HTML output without any escaping functions (no esc_attr(), esc_url(), or esc_html()). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- wpshouter Switch CTA Box
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/19a3fc90-b81c-4451-80e0-cead99a2dcd9?source=cve
- plugins.trac.wordpress.org /browser/switch-cta-box/trunk/inc/box_display_template.php#L18
- plugins.trac.wordpress.org /browser/switch-cta-box/tags/1.1/inc/box_display_template.php#L18
- plugins.trac.wordpress.org /browser/switch-cta-box/trunk/inc/box_display_template.php#L14
- plugins.trac.wordpress.org /browser/switch-cta-box/tags/1.1/inc/box_display_template.php#L14
- plugins.trac.wordpress.org /browser/switch-cta-box/trunk/inc/box_display_template.php#L2
- plugins.trac.wordpress.org /browser/switch-cta-box/tags/1.1/inc/box_display_template.php#L2
- plugins.trac.wordpress.org /browser/switch-cta-box/trunk/inc/shortcode_setup.php#L8
- plugins.trac.wordpress.org /browser/switch-cta-box/tags/1.1/inc/shortcode_setup.php#L8
Sources
- CVE List CVE-2026-4088
- NVD CVE-2026-4088
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.