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VulnerabilityPublished Updated

CVE-2024-5853: Image Optimizer, Resizer and CDN (WordPress plugin) · Unrestricted File Upload

Affects Image Optimizer, Resizer and CDN (WordPress plugin)Source CVE Database V5

0

Not known to be exploited · CVSS 9.9 Critical.

Data as of 26 Oct 2026, 12:54 UTC

CVSS 3.1 base score
9.9Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jun 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
sirv Image Optimizer, Resizer and CDN – SirvAffected
  • =0
Fixed in–

AI-suggested

Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or removing the Sirv plugin if not essential. Monitor for updates from the vendor and apply patches promptly once released.

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.

References

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