CVE-2026-116535: SEOPress stored cross-site scripting in display_name

CVE-2026-116535 · Severity: medium · CVSS 6.4 · Published 2026-10-31

SEOPress is a WordPress plugin that handles search engine optimization and on-site SEO features. Authenticated attackers with subscriber-level access can inject malicious scripts through their display name that execute when other users view pages, potentially stealing credentials or redirecting visitors to malicious sites. The vulnerability exists because the plugin substitutes tokens in the display name after WordPress's security checks have already been bypassed.

Vendors: SEOPress.

Quick answers

Is CVE-2026-116535 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-116535 being exploited in the wild.
How severe is CVE-2026-116535?
Medium severity, with a CVSS score of 6.4, published 31 October 2026.
Which products and versions are affected?
SEOPress – AI SEO Plugin & On-site SEO up to and including 10.3.
Is there a fix for CVE-2026-116535?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-116535 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-116535?
Check whether you run SEOPress – AI SEO Plugin & On-site SEO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

Stored XSS in the SEOPress plugin occurs due to insufficient input sanitization of the user display_name parameter combined with improper output escaping. An authenticated subscriber can set their display_name to include the literal %%archive_title%% token alongside HTML event-handler payloads; WordPress stores this unsanitized, and SEOPress later substitutes the token after escaping has occurred, allowing the injected script to execute. This affects all versions up to and including 10.3.

Affected products

  • SEOPress SEOPress – AI SEO Plugin & On-site SEO up to and including 10.3

Timeline

  • 2026-10-31: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.