CVE-2026-54868: FV Simpler SEO stored cross-site scripting (XSS) vulnerability
medium 6.5 published 2026-10-13
- Affected versions
- 1.9.7 and older
- Fixed in
- unknown
- Latest version
- 1.9.8
- Severity
- Medium · CVSS 6.5
- Active installs
- 2,000+
- Type
- Stored cross-site scripting (XSS)
What an attacker needs
- Access: A low-level account on the site, such as a subscriber or customer (per the CVSS score).
- Interaction: It also needs someone on the site (often an admin) to click a link, open a page or submit a form the attacker prepared.
CVSS vector (score by Patchstack): CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
What to do now
- Update FV Simpler SEO to the latest version (1.9.8). The record does not name a fixed version, so also read the advisory below.
- If you cannot update right away, deactivate it until you can.
- Not sure which version you run? Check your version against every known FV Simpler SEO issue.
With WP-CLI:
wp plugin get fv-all-in-one-seo-pack --field=version. - If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.
The advisory
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in FolioVision FV Simpler SEO fv-all-in-one-seo-pack allows Stored XSS.This issue affects FV Simpler SEO: from n/a through 1.9.7.
References
- NVD CVE-2026-54868 nvd.nist.gov
- Patchstack advisory patchstack.com
Related
Ran an affected version? Check your site for signs of a hack
The free scan reads the public side of your site and looks for spam pages, hidden redirects, injected scripts and blacklist entries. No login, no install, about a minute.
Where this data comes from
- CVE record, score and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
- Versions and install counts: wordpress.org/plugins/fv-all-in-one-seo-pack (Plugins API), fetched 2026-11-04.
- The summary, “what an attacker needs” and “what to do” sections are our plain-English reading of the record and the plugin's release history; the quoted description is the record's own text. Spot an error? Email Daniel.