Hummingbird Performance: known security problems
8 known security problems reported for this WordPress plugin, with the affected versions, the fix and what to do.
Updated
In short
There are 8 known security problems on this page. Each one has a fixed version. Updating to version 3.21.2 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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A stranger could run their own code on your site and take it over
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.21.0
- Fixed in
- 3.21.1
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.21.1 or newer.
- Official ID
- CVE-2026-83627
- Report title
- Hummingbird – Speed Optimization, Caching, Minify, Compress & CDN <= 3.21.0 - Unauthenticated Remote Code Execution via Cookie Name in Page Cache Debug Log
- First reported
- Sources
- Wordfence, seen
Someone who already has an admin account could run their own code on your site and take it over
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Before 3.21.2
- Fixed in
- 3.21.2
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.21.2 or newer.
- Official ID
- CVE-2026-19224
- Report title
- Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN < 3.21.2 - Authenticated (Administrator+) Remote Code Execution
- First reported
- Sources
- Wordfence, seen
A stranger could see private information they should not see
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.18.0
- Fixed in
- 3.18.1
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.18.1 or newer.
- Official ID
- CVE-2025-14437
- Report title
- Hummingbird <= 3.18.0 - Unauthenticated Sensitive Information Exposure via Log File
- First reported
- Sources
- Wordfence, seen
Someone could trick a logged-in admin into changing settings without knowing
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.9.1
- Fixed in
- 3.9.2
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.9.2 or newer.
- Official ID
- CVE-2024-43117
- Report title
- Hummingbird <= 3.9.1 - Cross-Site Request Forgery
- First reported
- Sources
- Wordfence, seen
Someone could do things on your site they should not be allowed to (up to and including 3.9.1)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.9.1
- Fixed in
- 3.9.2
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.9.2 or newer.
- Official ID
- CVE-2024-43118
- Report title
- Hummingbird <= 3.9.1 - Missing Authorization
- First reported
- Sources
- Wordfence, seen
Someone could do things on your site they should not be allowed to (up to and including 3.7.3)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.7.3
- Fixed in
- 3.7.4
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.7.4 or newer.
- Official ID
- CVE-2024-32792
- Report title
- Hummingbird <= 3.7.3 - Missing Authorization
- First reported
- Sources
- Wordfence, seen
A stranger 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 3.4.1
- Fixed in
- 3.4.2
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.4.2 or newer.
- Official ID
- CVE-2023-1478
- Report title
- Hummingbird <= 3.4.1 - Unauthenticated Path Traversal
- 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
- Before 3.3.2
- Fixed in
- 3.3.2
- What to do
- If your site has an affected version, update Hummingbird Performance to version 3.3.2 or newer.
- Official ID
- CVE-2022-0994
- Report title
- Hummingbird <= 3.3.1 - Admin+ Stored 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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