Ultimate Blocks: known security problems
16 known security problems reported for this WordPress plugin, with the affected versions, the fix and what to do.
Updated
In short
There are 16 known security problems on this page. Each one has a fixed version. Updating to version 3.3.7 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 (up to and including 3.3.6)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.3.6
- Fixed in
- 3.3.7
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.3.7 or newer.
- Official ID
- CVE-2025-49929
- Report title
- Ultimate Blocks <= 3.3.6 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.3.3)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.3.3
- Fixed in
- 3.3.4
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.3.4 or newer.
- Official ID
- CVE-2025-2918
- Report title
- Ultimate Blocks – WordPress Blocks Plugin <= 3.3.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Widgets
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.3.0)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.3.0
- Fixed in
- 3.3.1
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.3.1 or newer.
- Official ID
- CVE-2025-48234
- Report title
- Ultimate Blocks <= 3.3.0 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.2.9)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.2.9
- Fixed in
- 3.3.0
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.3.0 or newer.
- Official ID
- CVE-2025-47493
- Report title
- Ultimate Blocks <= 3.2.9 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.2.7)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.2.7
- Fixed in
- 3.2.8
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.2.8 or newer.
- Official ID
- CVE-2025-31077
- Report title
- Ultimate Blocks <= 3.2.7 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.2.7) (2)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.2.7
- Fixed in
- 3.2.8
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.2.8 or newer.
- Official ID
- CVE-2025-1703
- Report title
- Ultimate Blocks <= 3.2.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via content Parameter
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.2.7) (3)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.2.7
- Fixed in
- 3.2.8
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.2.8 or newer.
- Official ID
- CVE-2025-1312
- Report title
- Ultimate Blocks – WordPress Blocks Plugin <= 3.2.7 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.2.3)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.2.3
- Fixed in
- 3.2.4
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.2.4 or newer.
- Official ID
- CVE-2024-10678
- Report title
- Ultimate Blocks <= 3.2.3 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.2.1)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.2.1
- Fixed in
- 3.2.2
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.2.2 or newer.
- Official ID
- CVE-2024-8536
- Report title
- Ultimate Blocks <= 3.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.1.9)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.1.9
- Fixed in
- 3.2.0
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.2.0 or newer.
- Official ID
- CVE-2024-4268
- Report title
- Ultimate Blocks – WordPress Blocks Plugin <= 3.1.9 - Authenticated(Contributor+) Stored Cross-Site Scripting via Multiple Blocks
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.1.9) (2)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.1.9
- Fixed in
- 3.2.0
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.2.0 or newer.
- Official ID
- CVE-2024-3513
- Report title
- Ultimate Blocks – WordPress Blocks Plugin <= 3.1.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via title tag attribute
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.1.7)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.1.7
- Fixed in
- 3.1.9
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.1.9 or newer.
- Official ID
- CVE-2024-4655
- Report title
- Ultimate Blocks – WordPress Blocks Plugin <= 3.1.7 - Authenticated (Contributor+) Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.1.0)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.1.0
- Fixed in
- 3.1.1
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.1.1 or newer.
- Official ID
- CVE-2023-6692
- Report title
- Ultimate Blocks – WordPress Blocks Plugin <= 3.0.8 - Authenticated(Contributor+) Stored Cross-Site Scripting via metabox
- First reported
- Sources
- Wordfence, seen
Someone with a contributor account on your site could plant harmful code that runs for your visitors or admins (up to and including 3.1.6)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 3.1.6
- Fixed in
- 3.1.7
- What to do
- If your site has an affected version, update Ultimate Blocks to version 3.1.7 or newer.
- Official ID
- CVE-2024-3241
- Report title
- Ultimate Blocks <= 3.1.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via Advanced Heading
- 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 2.5.1
- Fixed in
- 2.5.2
- What to do
- If your site has an affected version, update Ultimate Blocks to version 2.5.2 or newer.
- Official ID
- CVE-2023-33999
- Report title
- Freemius SDK <= 2.5.9 - Reflected Cross-Site Scripting via fs_request_get
- 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
- Before 2.4.13
- Fixed in
- 2.4.13
- What to do
- If your site has an affected version, update Ultimate Blocks to version 2.4.13 or newer.
- Official ID
- CVE-2022-4974
- Report title
- Freemius SDK <= 2.4.2 - Missing Authorization Checks
- 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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