CVE-2023-47793

Acme Fix Images <= 1.0.0 - Missing Authorization via acme_fix_images_ajax_callback

2023-11-15 00:00

Strategic Overview

Status: Patched in 2.0.0
Affected Plugin: Acme Fix Images – Regenerate Thumbnails
Affected Version: <= 1.0.0
CVSS: 5.3Medium
Weakness type: CWE-862 · Missing Authorization
CVE: CVE-2023-47793

View all Acme Fix Images – Regenerate Thumbnails vulnerabilities

At a glance

CVE-2023-47793 is a medium-severity Missing Authorization vulnerability in the Acme Fix Images WordPress plugin, affecting versions <= 1.0.0. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 2.0.0; sites on affected versions should update now. Disclosed November 2023, reported by Abdi Pranata.

Vulnerability Overview

The Acme Fix Images plugin for WordPress is vulnerable to unauthorized access to the acme_fix_images_ajax_callback function in versions up to, and including, 1.0.0. This makes it possible for authenticated attackers, with subscriber-level access and above, to resize images.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

Reaching this weakness in Acme Fix Images <= 1.0.0 takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Acme Fix Images the fix is 2.0.0: builds <= 1.0.0 are affected, anything from 2.0.0 onward is not.

Remediation

Update to version 2.0.0, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Acme Fix Images 2.0.0 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2023-47793 https://www.wordfence.com/threat-intel/vulnerabilities/id/b9047775-2d72-4eb5-9339-419f95aa19b2 https://nvd.nist.gov/vuln/detail/CVE-2023-47793

CVSS Vector

5.3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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