CVE-2026-18344: Responsive Thumbnail Slider (WordPress plugin) · Cross-site Scripting
Affects Responsive Thumbnail Slider (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 6.1 Medium : upgrade to 1.1.53 when convenient.
Data as of 30 Oct 2026, 20:25 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.1.53
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 1 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade Responsive Thumbnail Slider (WordPress plugin) to 1.1.53.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| nik00726Responsive Thumbnail Slider | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, users should avoid clicking on untrusted links that include the 'id' parameter targeting this plugin. Monitoring for updates from the plugin vendor nik00726 is recommended to apply any forthcoming official patches or mitigations.
Description
The Wp Responsive Thumbnail Slider plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'id' parameter in versions up to, and excluding, 1.1.53. This is due to insufficient input sanitization and output escaping in the responsive_thumbnail_image_management() function, which echoes $_GET['id'] directly into a double-quoted HTML attribute with no esc_attr() call. The only guard is a loose PHP numeric comparison ($_GET['id']>0) that a string beginning with a numeric prefix trivially satisfies, and the addslashes() applied by wp_magic_quotes() is inert in HTML-attribute context because backslash is not an HTML escape character. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a specially crafted link.
References
- wordfence.com/threat-intel/vulnerabilities/id/c7370cbc-f681-49d7-9330-762443202529?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/browser/wp-responsive-thumbnail-slider/trunk/wp-responsive-images-thumbnail-slider.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/wp-responsive-thumbnail-slider/trunk/wp-responsive-images-thumbnail-slider.php (opens in a new tab)