EWWW Image Optimizer <= 8.7.0 — Authenticated (Administrator+) Cross-Site WebP File Deletion or Rename
CVE-2026-91072Published · Updated Action summary
Affected: ≤8.7.0Update to 8.8.0 or newer
All remediation steps- Severity
- Medium4.7
- CVSS
- 4.7CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:LWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:HPrivileges required- High
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:LAvailability- Low
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
EWWW Image Optimizer ewww-image-optimizer
- Affected≤ 8.7.0
- Patched in8.8.0
Update to 8.8.0 or newer.
You are affected if you run ≤ 8.7.0. Version 8.8.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under EWWW Image Optimizer.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 8.8.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch EWWW Image Optimizer to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Karthik Ramakrishnan.
The EWWW Image Optimizer plugin for WordPress is vulnerable to Arbitrary File Deletion in all versions up to, and including, 8.7.0. This is due to missing upload-directory scope enforcement in the WebP migration file-operation routine, allowing paths outside the current site's uploads folder on multisite. This makes it possible for authenticated attackers, with administrator-level access and above, to rename or delete WebP-derivative image files outside their own site's uploads directory, including files belonging to other sites on a multisite network.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in EWWW Image Optimizer
All 14| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | 8.9.0 - Authenticated (Author+) Stored Cross-Site Scripting 8.7.4 – 8.9.0Update to 8.9.1 | CVE-2026-91049 | |
| Medium6.1 | Reflected Cross-Site Scripting via REQUEST_URI Parameter Key ≤8.7.7Update to 8.8.0 | CVE-2026-92826 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤8.7.7Update to 8.8.0 | CVE-2026-97067 | |
| High7.5 | 8.7.7 - Authenticated (Author+) PHP Object Injection 8.6.0 – 8.7.7Update to 8.8.0 | CVE-2026-91051 | |
| Medium6.4 | Authenticated (Author+) Stored Cross-Site Scripting ≤8.7.6Update to 8.7.7 | CVE-2026-91011 |
- Medium6.48.9.0 - Authenticated (Author+) Stored Cross-Site Scripting
8.7.4 – 8.9.0Update to 8.9.1
- Medium6.1Reflected Cross-Site Scripting via REQUEST_URI Parameter Key
≤8.7.7Update to 8.8.0
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤8.7.7Update to 8.8.0
- High7.58.7.7 - Authenticated (Author+) PHP Object Injection
8.6.0 – 8.7.7Update to 8.8.0
- Medium6.4Authenticated (Author+) Stored Cross-Site Scripting
≤8.7.6Update to 8.7.7
Timeline
CVE published
Severity medium, CVSS 4.7
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.