What’s Vulnerable › Vulnerabilities

CVE-2024-5853: Image Optimizer, Resizer and CDN – Sirv <= 7.2.6 - Authenticated (Contributor+) Arbitrary File Upload

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-06-19 · updated 2026-06-17
• Weakness: CWE-434

Description

The Image Optimizer, Resizer and CDN – Sirv plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the sirv_upload_file_by_chanks AJAX action in all versions up to, and including, 7.2.6. This makes it possible for authenticated attackers, with Contributor-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

Affected products

• sirv Image Optimizer, Resizer and CDN – Sirv: before 7.2.7 — fixed in 7.2.7

How to fix

Upgrade to a fixed version: sirv Image Optimizer, Resizer and CDN – Sirv 7.2.7. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/changeset/3103410/sirv/trunk/sirv.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/e89b40ec-1952-46e3-a91b-bd38e62f8929?source=cve
• https://plugins.trac.wordpress.org/changeset/3103410/sirv/trunk/sirv.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/e89b40ec-1952-46e3-a91b-bd38e62f8929?source=cve

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