HTTP Headers <= 1.18.11 — Server-Side Request Forgery
CVE-2023-37978Published · Updated Action summary
Affected: ≤1.18.11Update to 1.19.0 or newer
All remediation steps- Severity
- Medium5.5
- CVSS
- 5.5CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:HPrivileges required- High
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-918 SSRF
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
HTTP Headers http-headers
- Affected≤ 1.18.11
- Patched in1.19.0
Update to 1.19.0 or newer.
You are affected if you run ≤ 1.18.11. Version 1.19.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under HTTP Headers.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 1.19.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch HTTP Headers to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to emad.
The HTTP Headers plugin for WordPress is vulnerable to Server-Side Request Forgery in versions up to, and including, 1.18.11 via the ajax-inspect.php file. This can allow authenticated attackers with admin access to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in HTTP Headers
All 7| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Authenticated (Administrator+) External Control of File Name or Path to RCE via 'hh_htpasswd_path' and 'hh_www_authenticate_user' Parameters ≤1.19.2Update to 1.19.3 | CVE-2026-4132 | |
| Medium5.5 | Authenticated (Administrator+) CRLF Injection via Custom Header Values ≤1.19.5No patch available | CVE-2026-2717 | |
| Medium4.4 | Authenticated (Administrator+) Stored Cross-Site Scripting via 'Custom Headers' Plugin Setting ≤1.19.4Update to 1.19.5 | CVE-2026-1379 | |
| Medium4.4 | Authenticated (Administrator+) Stored Cross-Site Scripting ≤1.18.11Update to 1.19.0 | CVE-2023-37874 | |
| Medium6.6 | Authenticated(Administrator+) Remote Code Execution ≤1.18.10Update to 1.18.11 | CVE-2023-1208 |
- High7.2Authenticated (Administrator+) External Control of File Name or Path to RCE via 'hh_htpasswd_path' and 'hh_www_authenticate_user' Parameters
≤1.19.2Update to 1.19.3
- Medium5.5Authenticated (Administrator+) CRLF Injection via Custom Header Values
≤1.19.5No patch available
- Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting via 'Custom Headers' Plugin Setting
≤1.19.4Update to 1.19.5
- Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting
≤1.18.11Update to 1.19.0
- Medium6.6Authenticated(Administrator+) Remote Code Execution
≤1.18.10Update to 1.18.11
Same weakness (SSRF)
All SSRF| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 5.5
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.