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PatchSiren cyber security CVE debrief

CVE-2019-25744 Popup-Builder CVE debrief

CVE-2019-25744 is a persistent cross-site scripting (XSS) vulnerability in WordPress Popup Builder 3.49. The vulnerability allows authenticated attackers to inject malicious scripts by breaking out of option tags in the post_title parameter. Attackers can submit crafted POST requests to the post.php endpoint with script payloads in the post_title field, which execute when pages or posts display popup selections.

Vendor
Popup-Builder
Product
Unknown
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Users of WordPress Popup Builder 3.49, administrators of WordPress sites with the plugin installed, and security teams monitoring for XSS vulnerabilities.

Technical summary

The vulnerability has a CVSS score of 5.1 and is classified as MEDIUM severity. It requires authentication (PR:L) and user interaction (UI:P) to exploit. The attack vector is network-based (AV:N), and the vulnerability can lead to localized impacts on confidentiality (VC:N) and integrity (VI:N).

Defensive priority

MEDIUM

Recommended defensive actions

  • Update WordPress Popup Builder to a version that fixes the XSS vulnerability.
  • Validate and sanitize user input to prevent script injection.
  • Implement Content Security Policy (CSP) to mitigate XSS attacks.

Evidence notes

The CVE record was published on 2026-06-04T14:16:33.717Z and last modified on 2026-06-10T02:16:32.290Z. The vulnerability affects Popup Builder 3.49.

Sources and references

Verified primary and authoritative sources

  • CVE-2019-25744 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2019-25744

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2019-25744 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2019-25744

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.