# CVE-2026-75134 — SEOWriting

> As of 2026-09-03, CVE-2026-75134 is a MEDIUM-severity vulnerability in SEOWriting, CVSS v3.1 6.4, EPSS 0.1% (8.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-75134 as of 2026-09-03; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-03

## What is 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.

The record classifies CVE-2026-75134 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 33 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.4 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`)
- **CVSS v4.0 base score:** 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 8.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-02, last modified 2026-09-03

## Is CVE-2026-75134 being exploited?

It currently carries a trending score of 32 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **SEOWriting**: SEOWriting

## How to fix CVE-2026-75134

No vendor patch reference has been recorded for CVE-2026-75134 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-75134

No threat campaign in the Threadlinqs corpus currently references CVE-2026-75134, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, GitHub Security Advisories, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-09-04. This product uses the NVD API but is not endorsed or certified by the NVD.

**Exploit and proof of concept**

- [github.com — technical description](https://github.com/Elymaro/CVE/blob/main/WordPress/CVE-2026-75134.md)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/seowriting-wordpress-plugin-stored-xss-via-iframe-onload)

**Issue tracking and product pages**

- [wordpress.org — product](https://wordpress.org/plugins/seowriting/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-75134
Full detection coverage and IOCs for threats exploiting CVE-2026-75134 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp