XSS in Popup-Builder Popup Builder
CVE-2019-25744
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (5.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Popup-Builder Popup Builder — versions 3.49
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/47518 (exploit)
- popup-builder.com/ (product)
- wordpress.org/plugins/popup-builder/ (product)
- www.vulncheck.com/advisories/wordpress-popup-builder-persistent-cross-site-scri… (third-party-advisory)
Frequently asked questions
- What is CVE-2019-25744?
- CVE-2019-25744 is a medium-severity vulnerability in Popup-Builder Popup Builder, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-04.
- How severe is CVE-2019-25744?
- Medium severity. CVSS v3 base score is 5.4 out of 10.