CVE-2023-0992
MediumShield Security <= 17.0.17 - Unauthenticated Stored Cross-Site Scripting
Published Apr 24, 2023 · Updated Apr 8, 2026 · Also known as 162dff28-94ea-4a47-a6cb-a13317cf1a04
Key Facts
Patch immediately- CVE-2023-0992 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting Shield Security (Getshieldsecurity), wp-simple-firewall (wordpress-plugin), Shield: Blocks Bots, Protects Users, and Prevents Security Breaches.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 93% probability of exploitation in the next 30 days.
- Fixed versions are available, including Shield Security 17.0.17, Shield: Blocks Bots, Protects Users, and Prevents Security Breaches 17.0.18, wp-simple-firewall 17.0.18.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
93%
Higher than 99.8% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2023-0992 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Shield SecurityGetshieldsecurity | See advisory | 17.0.17 |
| wp-simple-firewallwordpress-plugin | See advisory | 17.0.18 |
| Shield: Blocks Bots, Protects Users, and Prevents Security Breaches | See advisory | 17.0.18 |
Patched Releases
Shield Security
17.0.17
Shield: Blocks Bots, Protects Users, and Prevents Security Breaches
17.0.18
wp-simple-firewall
17.0.18
Timeline
Publicly disclosed
Apr 24, 2023
Last updated
Apr 8, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/162dff28-94ea-4a47-a6cb-a13317cf1a04?source=api-prod
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/162dff28-94ea-4a47-a6cb-a13317cf1a04?source=api-scan
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/162dff28-94ea-4a47-a6cb-a13317cf1a04?source=cve
- patchhttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2883864%40wp-simple-firewall%2Ftrunk&old=2883536%40wp-simple-firewall%2Ftrunk&sfp_email=&sfph_mail=
- otherhttps://wordpress.org/plugins/wp-simple-firewall/#developers
FAQ
Common Questions.
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.
Affected: Shield Security (Getshieldsecurity); wp-simple-firewall (wordpress-plugin); Shield: Blocks Bots, Protects Users, and Prevents Security Breaches. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Shield Security 17.0.17, Shield: Blocks Bots, Protects Users, and Prevents Security Breaches 17.0.18, wp-simple-firewall 17.0.18.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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