Vigilant <= 2.10.2 - Unauthenticated Stored Cross-Site Scripting
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Vigilant – 100% Free Security Suite: Firewall, 2FA, Login, Headers, Scanner… plugin for WordPress is vulnerable to Stored Cross-Site Scripting via User-Agent Header in all versions up to, and including, 2.10.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The malicious payload is delivered passively by any unauthenticated visitor who triggers a failed login attempt with a crafted User-Agent header, requiring no further interaction from the attacker once stored.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| fernandot | Vigilant – 100% Free Security Suite: Firewall, 2FA, Login, Headers, Scanner… | up to 2.10.2 | — | No fix listed | CNA |
- Vigilant – 100% Free Security Suite: Firewall, 2FA, Login, Headers, Scanner… Vendorfernandot Affected up to 2.10.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-81754
- 2026-10-03 Alias added: GHSA-9f7m-65q5-q8hw
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c483cdc5-56e4-4ee7-a782-0505816728ab?source=cve
- https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-database.php#L448
- https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-database.php#L639
- https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/assets/js/admin.js#L1996
- https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/assets/js/admin.js#L2778
- https://plugins.trac.wordpress.org/browser/vigilante/tags/2.9.5/includes/class-login-security.php#L899
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3669625%40vigilante%2Ftrunk%2Fassets%2Fjs%2Fadmin.js&old=3667821%40vigilante%2Ftrunk%2Fassets%2Fjs%2Fadmin.js&sfp_email=&sfph_mail=
Sources
- CVE-2026-81754 · CVE Program
- CVE-2026-81754 · NVD
- FIRST EPSS
- GHSA-9f7m-65q5-q8hw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences