CVE-2023-5843Network attack vector

Unauthenticated code execution via unrestricted callback selection

Published Oct 30, 2023 · Updated Apr 8, 2026

Code injection in Datafeedr Ads by datafeedr.com 1.1.3 and earlier allows remote attackers to execute limited server-side PHP callbacks. The dfads_ajax_load_ads AJAX handler passes request parameters into dfads(), which invokes any existing PHP function named by callback_function through call_user_func_array. A reachable WordPress site with the plugin active is sufficient; arguments are constrained, but successful calls execute in the server process and can read, alter, or interrupt site data.

CVSS severity9.0
Critical
EPSS probability2.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Datafeedr Ads by datafeedr.com 1.1.3 and earlier allows remote attackers to execute limited server-side PHP callbacks. The dfads_ajax_load_ads AJAX handler passes request parameters into dfads(), which invokes any existing PHP function named by callback_function through call_user_func_array. A reachable WordPress site with the plugin active is sufficient; arguments are constrained, but successful calls execute in the server process and can read, alter, or interrupt site data.

The record

CVE
CVE-2023-5843
Published
Oct 30, 2023
Updated
Apr 8, 2026
Vendor
Datafeedr
Product
Ads by datafeedr.com
Classifications
CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Datafeedr · Ads by datafeedr.comversion=0 <=1.1.3

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.0WordfenceCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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