ICS Calendar: known security problems
4 known security problems reported for this WordPress plugin, with the affected versions, the fix and what to do.
Updated
In short
There are 4 known security problems on this page. Each one has a fixed version. Updating to version 12.1.1.1 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 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 12.1.1
- Fixed in
- 12.1.1.1
- What to do
- If your site has an affected version, update ICS Calendar to version 12.1.1.1 or newer.
- Official ID
- CVE-2026-59516
- Report title
- ICS Calendar <= 12.1.1 - Unauthenticated Stored Cross-Site Scripting
- 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 12.0.9
- Fixed in
- 12.0.9.2
- What to do
- If your site has an affected version, update ICS Calendar to version 12.0.9.2 or newer.
- Official ID
- CVE-2026-9838
- Report title
- ICS Calendar <= 12.0.9 - Reflected Cross-Site Scripting via 'htmltagtitle' Parameter
- First reported
- Sources
- Wordfence, seen
Someone with a contributor 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 10.12.0.2
- Fixed in
- 10.12.0.3
- What to do
- If your site has an affected version, update ICS Calendar to version 10.12.0.3 or newer.
- Official ID
- CVE-2023-46784
- Report title
- ICS Calendar <= 10.12.0.2 - Authenticated (Contributor+) Arbitrary File Read and Server-Side Request Forgery
- 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
- Before 10.12.0.2
- Fixed in
- 10.12.0.2
- What to do
- If your site has an affected version, update ICS Calendar to version 10.12.0.2 or newer.
- Official ID
- CVE-2023-46784
- Report title
- ICS Calendar <= 10.12.0.1 - Authenticated(Contributor+) Directory Traversal via _url_get_contents
- 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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