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VulnerabilityPublished Updated

CVE-2026-18344: Responsive Thumbnail Slider (WordPress plugin) · Cross-site Scripting

Affects Responsive Thumbnail Slider (WordPress plugin)Source CVE Database V5

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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

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
nik00726Responsive Thumbnail SliderAffected
  • <1.1.53
Fixed in
  • 1.1.53

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

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