PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-39482 PublishPress CVE debrief

A DOM-Based XSS vulnerability was discovered in the Post Expirator plugin for WordPress. This issue, tracked as CVE-2026-39482, allows attackers to inject malicious scripts into web pages. The vulnerability has a CVSS score of 6.5 and is classified as MEDIUM severity. The Post Expirator plugin is used by WordPress administrators to schedule posts to expire. The vulnerability occurs when user input is not properly sanitized, allowing an attacker to inject malicious scripts into the web page. This can lead to unauthorized access, data theft, or other malicious activities. Administrators and users of the Post Expirator plugin for WordPress should be aware of this vulnerability and take necessary actions to protect their installations.

Vendor
PublishPress
Product
Post Expirator
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-24
Advisory published
2026-04-08
Advisory updated
2026-07-24

Who should care

Administrators and users of the Post Expirator plugin for WordPress should be aware of this vulnerability and take necessary actions to protect their installations. This includes updating the plugin to a version that is not vulnerable, implementing input validation and sanitization for user input, and using a web application firewall to detect and prevent XSS attacks. Additionally, security teams and vulnerability management teams should be aware of this vulnerability and review their systems to ensure they are not exposed.

Technical summary

The Post Expirator plugin for WordPress is vulnerable to a DOM-Based XSS attack. This type of vulnerability occurs when user input is not properly sanitized, allowing an attacker to inject malicious scripts into the web page. In this case, the vulnerability affects versions of the plugin from n/a through 4.9.4. The vulnerability can be exploited by an attacker who can inject malicious scripts into the web page, potentially leading to unauthorized access or data theft.

Defensive priority

Medium

Recommended defensive actions

  • Update the Post Expirator plugin to a version that is not vulnerable
  • Implement input validation and sanitization for user input
  • Use a web application firewall to detect and prevent XSS attacks
  • Regularly monitor and update plugins and software to prevent exploitation of known vulnerabilities
  • Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record was published on 2026-04-08T09:16:22.830Z and last modified on 2026-07-24T21:10:00.143Z. The NVD entry is currently Deferred. The Post Expirator plugin for WordPress is vulnerable to a DOM-Based XSS attack. This type of vulnerability occurs when user input is not properly sanitized, allowing an attacker to inject malicious scripts into the web page. The vulnerability affects versions of the plugin from n/a through 4.9.4. There may be additional details in the official CVE record or NVD entry that can help defenders understand the vulnerability and its impact.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-08T09:16:22.830Z and has not been modified since then. The NVD entry is currently Deferred.