CVE-2026-15798 json
Smart Slider 3 <= 3.5.1.38 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'slider' Block Attribute
published 2026-08-28 2 mo ago modified 2026-08-28 2 mo ago also EUVD-2026-67399
- 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 35%
- public exploits
- 0
- none known
Summary
The Smart Slider 3 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'slider' Block Attribute in all versions up to, and including, 3.5.1.38 due to insufficient input sanitization and output escaping. 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. The injected scripts execute specifically when a user opens the affected post in the WordPress block editor, making Editors and Administrators the primary targets.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% 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
- nextendweb Smart Slider 3
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/d5c045e2-a6be-425f-a4f3-1e79badf738b?source=cve
- plugins.trac.wordpress.org /browser/smart-slider-3/tags/3.5.1.38/Public/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Assets/dist
- plugins.trac.wordpress.org /browser/smart-slider-3/tags/3.5.1.38/Nextend/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Gutenberg.
- plugins.trac.wordpress.org /browser/smart-slider-3/tags/3.5.1.38/Nextend/SmartSlider3/Platform/WordPress/Shortcode/Shortcode.php#L270
- plugins.trac.wordpress.org /browser/smart-slider-3/tags/3.5.1.34/Public/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Assets/dist
- plugins.trac.wordpress.org /browser/smart-slider-3/tags/3.5.1.34/Nextend/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Gutenberg.
- plugins.trac.wordpress.org /browser/smart-slider-3/tags/3.5.1.34/Nextend/SmartSlider3/Platform/WordPress/Shortcode/Shortcode.php#L270
- plugins.trac.wordpress.org /changeset/3654530/smart-slider-3/trunk/Public/SmartSlider3/Platform/WordPress/Integration/Gutenberg/Assets/di
- plugins.trac.wordpress.org /changeset?old_path=%2Fsmart-slider-3/tags/3.5.1.38&new_path=%2Fsmart-slider-3/tags/3.5.1.39
Sources
- CVE List CVE-2026-15798
- NVD CVE-2026-15798
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.