CVE-2023-0992 — The Shield Security plugin for WordPress is vulnerable to stored Cross-Site Scri

The Shield Security plugin for WordPress is vulnerable to stored Cross-Site Scripting in versions up to, and including, 17.0.17 via the 'User-Agent' header. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute w

01What is this vulnerability?

The Shield Security plugin for WordPress is vulnerable to stored Cross-Site Scripting in versions up to, and including, 17.0.17 via the 'User-Agent' header. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-06-09T06:15:54.777
• Last modified: 2026-04-08T17:16:50.660

09References

• plugins.trac.wordpress.org — https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new…
• wordpress.org — https://wordpress.org/plugins/wp-simple-firewall/#developers
• www.wordfence.com — https://www.wordfence.com/blog/2023/04/multiple-vulnerabilities-patched-in-shiel…
• www.wordfence.com — https://www.wordfence.com/threat-intel/vulnerabilities/id/162dff28-94ea-4a47-a6c…
• plugins.trac.wordpress.org — https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new…
• wordpress.org — https://wordpress.org/plugins/wp-simple-firewall/#developers
• www.wordfence.com — https://www.wordfence.com/threat-intel/vulnerabilities/id/162dff28-94ea-4a47-a6c…