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Description

WordPress Popup Builder 3.49 contains a persistent cross-site scripting vulnerability that 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 that execute when pages or posts display popup selections.

PUBLISHED Reserved 2026-06-04 | Published 2026-06-04 | Updated 2026-06-05 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

3.49
affected

Credits

Unk9vvN finder

References

www.exploit-db.com/exploits/47518 (ExploitDB-47518) exploit

popup-builder.com/ (Official Product Homepage) product

wordpress.org/plugins/popup-builder/ (Product Reference) product

www.vulncheck.com/...builder-persistent-cross-site-scripting (VulnCheck Advisory: WordPress Popup Builder 3.49 Persistent Cross-Site Scripting) third-party-advisory

cve.org (CVE-2019-25744)

nvd.nist.gov (CVE-2019-25744)

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