ShortPixel Image Optimizer <= 5.6.3 - Missing Authorization
Strategic Overview
- Status
- Patched in 5.6.4
- Affected Version
<= 5.6.3- CVSS
- 4.3Medium
- Weakness type
- CWE-862 · Missing Authorization
- CVE
CVE-2024-48044
At a glance
CVE-2024-48044 is a medium-severity Missing Authorization vulnerability in the ShortPixel Image Optimizer WordPress plugin, affecting versions <= 5.6.3. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). The root cause is a missing authorization check on a reachable function. The issue is fixed in version 5.6.4; sites on affected versions should update now. Disclosed October 2024, reported by Rafie Muhammad.
Vulnerability Overview
The ShortPixel Image Optimizer plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on several actions in class/Controller/AjaxController.php in versions up to, and including, 5.6.3. This makes it possible for authenticated attackers, with contributor-level access and above, to perform several unauthorized actions.
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 interaction from a victim user.
CWE-862: Missing Authorization
Reaching this weakness in ShortPixel Image Optimizer <= 5.6.3 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 ShortPixel Image Optimizer the fix is 5.6.4: builds <= 5.6.3 are affected, anything from 5.6.4 onward is not.
Remediation
Update to version 5.6.4, 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: ShortPixel Image Optimizer 5.6.4 closes this, and updating the plugin is the step that ends it.
- Login Security
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF
- 7.5CVE-2026-39471: ShortPixel Image Optimizer PHP Object Injection
CVE-2026-39471 - 6.6ShortPixel Image Optimizer <= 5.4.1 PHP Object Injection
- 6.1ShortPixel Image Optimizer <= 4.22.9 Reflected Cross-Site Scripting
- 5.4CVE-2026-4335: ShortPixel Image Optimizer <= 6.4.3 Stored XSS
CVE-2026-4335 - 4.9CVE-2026-1246: ShortPixel Image Optimizer <= 6.4.2 Arbitrary File Read
CVE-2026-1246 - 4.9CVE-2024-48043: ShortPixel Image Optimizer <= 5.6.3 SQL Injection
CVE-2024-48043
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