ShortPixel Image Optimizer: known security problems
11 known security problems reported for this WordPress plugin, with the affected versions, the fix and what to do.
Updated
In short
There are 11 known security problems on this page. Each one has a fixed version. Updating to version 6.6.0 or newer covers every fixed problem listed here.
Based on public reports. Check the plugin’s changelog. Watchfox AI may be wrong.
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Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 6.5.6
- Fixed in
- 6.6.0
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 6.6.0 or newer.
- Official ID
- CVE-2026-103070
- Report title
- ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF <= 6.5.6 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Anyone with an account on your site, even a basic one could in some setups, take over your site
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 6.5.5
- Fixed in
- 6.5.6
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 6.5.6 or newer.
- Official ID
- CVE-2026-97246
- Report title
- ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF <= 6.5.5 - Authenticated (Subscriber+) PHP Object Injection
- First reported
- Sources
- Wordfence, seen
Someone with an author account on your site could in some setups, take over your site (up to and including 6.5.5)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 6.5.5
- Fixed in
- 6.5.6
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 6.5.6 or newer.
- Official ID
- CVE-2026-17086
- Report title
- ShortPixel Image Optimizer <= 6.5.5 - Authenticated (Author+) PHP Object Injection via Nested JSON Post Content
- First reported
- Sources
- Wordfence, seen
Someone with an author account on your site could in some setups, take over your site (up to and including 6.4.3)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 6.4.3
- Fixed in
- 6.4.4
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 6.4.4 or newer.
- Official ID
- CVE-2026-39471
- Report title
- ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF <= 6.4.3 - Authenticated (Author+) PHP Object Injection
- First reported
- Sources
- Wordfence, seen
Someone with an author account on your site could plant harmful code that runs for your visitors or admins
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 6.4.3
- Fixed in
- 6.4.4
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 6.4.4 or newer.
- Official ID
- CVE-2026-4335
- Report title
- ShortPixel Image Optimizer <= 6.4.3 - Authenticated (Author+) Stored Cross-Site Scripting via Attachment Title
- First reported
- Sources
- Wordfence, seen
Someone with an editor account on your site could read or delete private files on your server
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 6.4.2
- Fixed in
- 6.4.3
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 6.4.3 or newer.
- Official ID
- CVE-2026-1246
- Report title
- ShortPixel Image Optimizer <= 6.4.2 - Authenticated (Editor+) Arbitrary File Read via 'loadFile' Parameter
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could use it to harm your site
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 6.3.4
- Fixed in
- 6.3.5
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 6.3.5 or newer.
- Official ID
- CVE-2025-11378
- Report title
- ShortPixel Image Optimizer <= 6.3.4 - Authenticated (Contributor+) Settings Import/Export
- First reported
- Sources
- Wordfence, seen
Someone could do things on your site they should not be allowed to
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.6.3
- Fixed in
- 5.6.4
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 5.6.4 or newer.
- Official ID
- CVE-2024-48044
- Report title
- ShortPixel Image Optimizer <= 5.6.3 - Missing Authorization
- First reported
- Sources
- Wordfence, seen
Someone with an editor account on your site could read or change the data in your site’s database
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 5.6.3
- Fixed in
- 5.6.4
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 5.6.4 or newer.
- Official ID
- CVE-2024-48043
- Report title
- ShortPixel Image Optimizer <= 5.6.3 - Authenticated (Editor+) SQL Injection
- First reported
- Sources
- Wordfence, seen
Someone with an editor account on your site could in some setups, take over your site
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Before 5.4.2
- Fixed in
- 5.4.2
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 5.4.2 or newer.
- Report title
- ShortPixel Image Optimizer <= 5.4.1 - Authenticated(Editor+) PHP Object Injection
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 4.22.9
- Fixed in
- 4.22.10
- What to do
- If your site has an affected version, update ShortPixel Image Optimizer to version 4.22.10 or newer.
- Report title
- ShortPixel Image Optimizer <= 4.22.9 - Reflected Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Where this comes from
We collect these reports from public security sources and rewrite them in plain words. Each problem shows its sources and the date we first saw it. This page never says whether your own site is affected: only a check of your site’s versions can tell.
Get an email when your site is affected.
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