CVE-2023-27451Network attack vector

Authenticated internal-service access via arbitrary image URL

Published Nov 22, 2023 · Updated Apr 28, 2026

Server-side request forgery in Darren Cooney Instant Images 5.1.0.2 and earlier allows remote authenticated users to request arbitrary URLs. The instant_images_download function passes an attacker-supplied image URL to the WordPress server-side downloader without restricting requests to expected hosts. Author-level access is required, and the resulting requests can query or modify internal services reachable by the WordPress host.

CVSS severity8.8
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Darren Cooney Instant Images 5.1.0.2 and earlier allows remote authenticated users to request arbitrary URLs. The instant_images_download function passes an attacker-supplied image URL to the WordPress server-side downloader without restricting requests to expected hosts. Author-level access is required, and the resulting requests can query or modify internal services reachable by the WordPress host.

The record

CVE
CVE-2023-27451
Published
Nov 22, 2023
Updated
Apr 28, 2026
Vendor
Darren Cooney
Product
Instant Images
Classifications
CWE-918, T1090
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=n/a <=5.1.0.2 changes=[{"at":"5.2.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Darren Cooney · Instant Imagesversion=n/a <=5.1.0.2 changes=[{"at":"5.2.0","status":"unaffected"}]

Published CVSS scores

7.2PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
5.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1090Proxy

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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