XSS in Seowriting
CVE-2026-75134
SEOWriting plugin for WordPress through 1.12.5 contains a stored cross-site scripting vulnerability that allows authenticated contributors to inject malicious JavaScript by exploiting an overly permissive KSES allowlist that explicitly permits the onload event handler on iframe elements. Attackers can store crafted JavaScript payloads in post content that execute when the affected post is viewed or previewed by higher-privileged users, potentially leading to privilege escalation or account compromise.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.5% 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: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/Elymaro/CVE/blob/main/WordPress/CVE-2026-75134.md (technical-description, exploit)
- wordpress.org/plugins/seowriting/ (product)
- www.vulncheck.com/advisories/seowriting-wordpress-plugin-stored-xss-via-iframe-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75134?
- CVE-2026-75134 is a medium-severity vulnerability in Seowriting, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-02.
- How severe is CVE-2026-75134?
- Medium severity. CVSS v3 base score is 6.4 out of 10.