CVE-2026-42658: Mamunur Rashid Classified Listing unauthenticated XSS

CVE-2026-42658 · Severity: high · CVSS 7.1 · Published 2026-06-15

The Classified Listing plugin for WordPress, which allows users to create and manage classified ads, contains a security flaw that allows attackers to inject malicious scripts into the website. If a site administrator or visitor interacts with a specially crafted link or page, the attacker could steal session information, redirect users to malicious sites, or deface the website. This vulnerability can be exploited by anyone on the internet without needing an account on the affected site.

Technologies: RadiusTheme Classified Listing. Vendors: RadiusTheme.

Quick answers

Is CVE-2026-42658 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-42658 being exploited in the wild.
How severe is CVE-2026-42658?
High severity, with a CVSS score of 7.1, published 15 June 2026.
Which products and versions are affected?
RadiusTheme Classified Listing <= 5.3.8.
Is there a fix for CVE-2026-42658?
A patch was published on 2026-05-01: Fixed in version 5.3.9 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-42658 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-42658?
Check whether you run RadiusTheme Classified Listing at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A Cross-Site Scripting (XSS) vulnerability exists in the Classified Listing plugin for WordPress due to improper neutralization of input during web page generation (CWE-79). The flaw allows an unauthenticated remote attacker to inject arbitrary JavaScript or HTML payloads. Exploitation requires a victim (typically a site administrator) to perform an action, such as clicking a malicious link or visiting a crafted page (User Interaction required). Successful exploitation can lead to session hijacking, unauthorized actions in the context of the victim's browser, or site defacement. The vulnerability is addressed in version 5.3.9.

Affected products

  • Mamunur Rashid Classified Listing <= 5.3.8

Timeline

  • 2026-03-23: disclosed: Reported by endy via Patchstack
  • 2026-04-29: advisory: Initial advisory published by Patchstack
  • 2026-06-15: advisory: NVD publication date
  • 2026-05-01: patched: Fixed in version 5.3.9

References

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