EWWW Image Optimizer <= 8.7.7 - Reflected Cross-Site Scripting via REQUEST_URI Parameter Key
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The EWWW Image Optimizer plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via REQUEST_URI Parameter Key in all versions up to, and including, 8.7.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Successful exploitation requires that the enable_help option is active, as the vulnerable HelpScout Beacon script block is only emitted when that setting is enabled.
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 8.7.7 | — | No fix listed | CNA |
- EWWW Image Optimizer Vendornosilver4u Affected up to 8.7.7 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-03 Threatist record created from CVE-2026-92826
- 2026-10-03 Alias added: GHSA-g6w7-2x8j-gggq
- 2026-10-03 CISA SSVC decision points changed
References
Other 8
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a9295e78-b45d-4738-b14e-1a16d5915920?source=cve
- https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk.php#L470
- https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/bulk.php#L462
- https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/class-base.php#L269
- https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/class-base.php#L305
- https://plugins.trac.wordpress.org/browser/ewww-image-optimizer/tags/8.7.7/classes/class-base.php#L290
- https://plugins.trac.wordpress.org/browser/ewww-image-optimizer?rev=3712144
- https://plugins.trac.wordpress.org/changeset/3712144/ewww-image-optimizer/trunk/classes/class-base.php
More nosilver4u vulnerabilities
- TI-2026-12994 Cross-site scripting in nosilver4u EWWW Image Optimizer CVSS 3.1MEDIUM 6.4
- TI-2024-21027 WordPress EWWW Image Optimizer plugin <= 7.2.3 - Cross Site Request Forgery (CSRF) vulnerability CVSS 3.1MEDIUM 4.3
Sources
- CVE-2026-92826 · CVE Program
- CVE-2026-92826 · NVD
- FIRST EPSS
- GHSA-g6w7-2x8j-gggq · 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