Plugin vulnerabilities
Is Smush safe? Known vulnerabilities and the version to run.
Smush: compresses, resizes and lazy-loads images.
The short answer
Run Smush 4.3.6 or later. That version has a fix for every known vulnerability that's been patched.
- Known vulnerabilities
- 11
- In the last 12 months
- 5
- Rated high or critical
- 4
- No fix yet
- 0
Every known Smush vulnerability
Newest first. The most recent was disclosed on 11 November 2026. Each one links to its full record on Wordfence.
| Vulnerability | Severity | Affected versions | Fixed in |
|---|---|---|---|
| Authenticated (Author+) Insecure Direct Object ReferenceCVE-2026-118241 · 11 November 2026 | Medium 4.3 | before 4.3.6 | 4.3.6 |
| Authenticated (Contributor+) Stored Cross-Site ScriptingCVE-2026-120845 · 6 November 2026 | Medium 6.4 | 4.3.5 and earlier | 4.3.6 |
| Missing AuthorizationCVE-2026-110039 · 14 October 2026 | Low 2.7 | 4.3.3 and earlier | 4.3.4 |
| Authenticated (Administrator+) Remote Code ExecutionCVE-2026-19223 · 27 August 2026 | High 7.2 | before 4.3.2 | 4.3.2 |
| Unauthenticated Denial of ServiceCVE-2026-81285 · 27 August 2026 | High 7.5 | 4.2.0 and earlier | 4.3.0 |
| Authenticated (Admin+) Directory TraversalCVE-2025-22288 · 29 March 2025 | Low 2.7 | 3.17.0 and earlier | 3.17.1 |
| Missing Authorization to Resmush List DeletionCVE-2023-3352 · 20 June 2024 | Medium 4.3 | 3.16.4 and earlier | 3.16.5 |
| Cross-Site ScriptingCVE-2022-1009 · 3 May 2022 | Medium 4.4 | 3.9.8 and earlier | 3.9.9 |
| Authenticated PHAR Deserialization10 December 2018 | High 8.8 | 3.0.0 and earlier | 3.0.1 |
| Cross-Site Scripting10 December 2018 | Critical 9.8 | 2.9.1 and earlier | 3.0.0 |
| Directory TraversalCVE-2017-15079 · 21 September 2017 | Medium 5.3 | 2.7.5 and earlier | 2.7.6 |
If you run Smush
What to do now
- Check your version. In WordPress, go to Plugins and look under Smush. Compare it with the affected versions above.
- Update to 4.3.6 or later. Take a backup first, then update. If the update breaks something, you can restore the backup while you work out why.
- Check the rest of your site. One outdated plugin is rarely the only one. Our free security check looks at your WordPress version, and the plugins and theme it can see from the outside, for known flaws and emails you a report.
Pressfort keeps your plugins up to date for you, testing each update on a copy of your site first, and its virtual patching blocks attacks on newly disclosed flaws, often before a fix is out. If your site does get hacked, two clean-ups a year are included, with a developer stepping in when needed. See how it works.
Caching and performance
Related plugins
LiteSpeed Cache
A caching and speed plugin, mainly for sites on LiteSpeed web servers.
30 known12 in the last year
EWWW Image Optimizer
Compresses images and converts them to WebP to make pages load faster.
14 known8 in the last year
SiteGround Speed Optimizer
SiteGround's caching and performance plugin, often preinstalled on sites hosted there.
5 known3 in the last year
WP Fastest Cache
A simple caching plugin for speeding up WordPress.
39 known5 in the last year
WP-Optimize
Cleans the database, compresses images and caches pages to speed a site up.
5 known2 in the last year
WP Super Cache
Automattic's page caching plugin, which serves static copies of pages to speed sites up.
12 known
Data sources and licences
Vulnerability data comes from Wordfence Intelligence and is refreshed daily. Severity is the CVSS score given in each record. Pressfort is not affiliated with Wordfence or Defiant Inc.
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- Known vulnerability in 1 pluginGallery plugin, file upload flawUrgent
- WordPress is out of dateRunning 6.7.1, latest is 6.8.3To fix
- 6 plugins and 1 theme out of dateOldest is 14 months behindTo fix