EWWW Image Optimizer <= 5.8.1 - Cross-Site Request Forgery Bypass
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-352.
Summary
The EWWW Image Optimizer plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 5.8.1. This is due to missing or incorrect nonce validation on the ewww_ngg_bulk_init() function. This makes it possible for unauthenticated attackers to perform bulk image optimization via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nosilver4u | EWWW Image Optimizer | up to 5.8.1 | — | No fix listed | CNA |
- EWWW Image Optimizer Vendornosilver4u Affected up to 5.8.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-36750
- 2026-10-03 Alias added: GHSA-g7q2-c4xh-c3xc
References
Advisory 3
Other 5
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/
- https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/
More nosilver4u vulnerabilities
- TI-2026-12994 Cross-site scripting in nosilver4u EWWW Image Optimizer CVSS 3.1MEDIUM 6.4
- TI-2026-67408 EWWW Image Optimizer <= 8.7.7 - Reflected Cross-Site Scripting via REQUEST_URI Parameter Key CVSS 3.1MEDIUM 6.1
- TI-2024-21027 WordPress EWWW Image Optimizer plugin <= 7.2.3 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1MEDIUM 4.3
Sources
- CVE-2020-36750 · CVE Program
- CVE-2020-36750 · NVD
- FIRST EPSS
- GHSA-g7q2-c4xh-c3xc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences