CVE-2024-5853: The Image Optimizer, Resizer and CDN – Sirv plugin for WordPress is vulnerable to arbitrary file uploads due t

Q: How do I fix CVE-2024-5853?

sirv: upgrade to 7.2.7. Exact commands for each OS are on this page.

Q: Is CVE-2024-5853 being exploited?

CVE-2024-5853 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-5853 affect?

CVE-2024-5853 affects sirv. Severity is critical (CVSS 9.9). 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 mak

Q: How urgent is CVE-2024-5853?

Priority 49/100. Critical severity

This month

CRITICAL 9.9UPGRADE

CVE-2024-5853 is a critical-severity flaw (CVSS 9.9) affecting sirv. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-434
Published	2024-06-19
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: sirv

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-06-19 06:15 UTCPublished CVE record published
2026-06-17 08:16 UTCUpdated Record last modified

sirv sirv UPGRADE

Affected: < 7.2.7

Fixed in: 7.2.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sirv || rpm -q sirv || sirv --version

2. UPGRADE to 7.2.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sirv

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sirv

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-5853?

sirv: upgrade to 7.2.7. Exact commands for each OS are on this page.

Is CVE-2024-5853 being exploited?

CVE-2024-5853 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-5853 affect?

CVE-2024-5853 affects sirv. Severity is critical (CVSS 9.9). 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 mak

How urgent is CVE-2024-5853?

Priority 49/100. Critical severity

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2025-46233 MEDIUM 6.5 UPGRADE Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Sirv CDN
CVE-2024-8964 MEDIUM 6.4 UPGRADE The Image Optimizer, Resizer and CDN – Sirv plugin for WordPress is vulnerable to Stored Cross-Site Scripting
CVE-2024-8480 HIGH 8.8 UPGRADE The Image Optimizer, Resizer and CDN – Sirv plugin for WordPress is vulnerable to unauthorized modification of
CVE-2024-6392 MEDIUM 5.4 UPGRADE The Image Optimizer, Resizer and CDN – Sirv plugin for WordPress is vulnerable to unauthorized plugin settings
CVE-2024-32959 HIGH 8.8 UPGRADE Incorrect Privilege Assignment vulnerability in Sirv CDN and Image Hosting Sirv sirv.This issue affects Sirv:

References

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