WP Booking System – Booking Calendar: 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 2.1.0.6 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 do things on your site they should not be allowed to (up to and including 2.1.0.5)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 2.1.0.5
- Fixed in
- 2.1.0.6
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.6 or newer.
- Official ID
- CVE-2026-116557
- Report title
- WP Booking System <= 2.1.0.5 - Missing Authorization to Unauthenticated Arbitrary Calendar Note Deletion via wpbs_calendar_remove_note AJAX Action
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins (up to and including 2.1.0.2)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 2.1.0.2
- Fixed in
- 2.1.0.3
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.3 or newer.
- Official ID
- CVE-2026-109147
- Report title
- Booking System <= 2.1.0.2 - Reflected Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Anyone with an account on your site, even a basic one could take over your site as an admin
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 2.1.0.3
- Fixed in
- 2.1.0.4
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.4 or newer.
- Official ID
- CVE-2026-109369
- Report title
- WP Booking System <= 2.1.0.3 - Missing Authorization to Authenticated (Subscriber+) Privilege Escalation via 'user_permission' Parameter via Cross-Form Nonce Reuse
- First reported
- Sources
- Wordfence, seen
Anyone with an account on your site, even a basic one 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 2.1.0.3
- Fixed in
- 2.1.0.4
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.4 or newer.
- Official ID
- CVE-2026-109368
- Report title
- WP Booking System <= 2.1.0.3 - Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via wpbs_refresh_calendar_editor AJAX action
- First reported
- Sources
- Wordfence, seen
A stranger could do things on your site they should not be allowed to (up to and including 2.1.0.3)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 2.1.0.3
- Fixed in
- 2.1.0.4
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.4 or newer.
- Official ID
- CVE-2026-108123
- Report title
- WP Booking System <= 2.1.0.3 - Missing Authorization to Unauthenticated Sensitive Information Disclosure via 'wpbs_action=email_logs' Action
- First reported
- Sources
- Wordfence, seen
Someone who already has an admin account 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 2.1.0.1
- Fixed in
- 2.1.0.2
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.2 or newer.
- Official ID
- CVE-2026-111178
- Report title
- WP Booking System <= 2.1.0.1 - Authenticated (Administrator+) SQL Injection via 'orderby' Parameter
- First reported
- Sources
- Wordfence, seen
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
- Before 2.1.0.1
- Fixed in
- 2.1.0.1
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.1 or newer.
- Official ID
- CVE-2026-107126
- Report title
- WP Booking System – Booking Calendar < 2.1.0.1 - Unauthenticated Stored Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Anyone with an account on your site, even a basic one 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 2.1.0.1
- Fixed in
- 2.1.0.2
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.1.0.2 or newer.
- Official ID
- CVE-2026-107712
- Report title
- WP Booking System <= 2.1.0.1 - Authenticated (Subscriber+) SQL Injection via 'current_month' Parameter
- First reported
- Sources
- Wordfence, seen
A stranger 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 2.0.19.12
- Fixed in
- 2.0.19.13
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.0.19.13 or newer.
- Official ID
- CVE-2025-68515
- Report title
- WP Booking System – Booking Calendar <= 2.0.19.12 - Unauthenticated Information Exposure
- First reported
- Sources
- Wordfence, seen
Someone could do things on your site they should not be allowed to (up to and including 2.0.19.10)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 2.0.19.10
- Fixed in
- 2.0.19.11
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.0.19.11 or newer.
- Official ID
- CVE-2024-50425
- Report title
- WP Booking System <= 2.0.19.10 - Missing Authorization via wpbs_refresh_calendar_editor
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins (up to and including 2.0.19.8)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 2.0.19.8
- Fixed in
- 2.0.19.9
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.0.19.9 or newer.
- Official ID
- CVE-2024-8797
- Report title
- WP Booking System – Booking Calendar <= 2.0.19.8 - Reflected Cross-Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone could do things on your site they should not be allowed to (up to and including 2.0.19.2)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Up to and including 2.0.19.2
- Fixed in
- 2.0.19.3
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.0.19.3 or newer.
- Official ID
- CVE-2023-49758
- Report title
- WP Booking System <= 2.0.19.2 - Missing Authorization
- First reported
- Sources
- Wordfence, seen
Someone 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 2.0.18
- Fixed in
- 2.0.18.1
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.0.18.1 or newer.
- Official ID
- CVE-2023-24402
- Report title
- WP Booking System <= 2.0.18 - Authenticated (Admin+) Stored Cross Site Scripting
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins (before 2.0.15)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Before 2.0.15
- Fixed in
- 2.0.15
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 2.0.15 or newer.
- Official ID
- CVE-2021-25061
- Report title
- WP Booking System – Booking Calendar <= 2.0.14 - Reflected Cross-Site Scripting
- 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
- Before 1.5.2
- Fixed in
- 1.5.2
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 1.5.2 or newer.
- Official ID
- CVE-2019-12239
- Report title
- WP Booking System Free version < 1.5.2 - Cross-Site Request Forgery
- First reported
- Sources
- Wordfence, seen
Someone could plant harmful code that runs for your visitors or admins (before 1.4)
A trusted security source confirmed it. If your site has an affected version, fix it this week.
- Affected versions
- Before 1.4
- Fixed in
- 1.4
- What to do
- If your site has an affected version, update WP Booking System – Booking Calendar to version 1.4 or newer.
- Official ID
- CVE-2017-2168
- Report title
- WP Booking System – Booking Calendar < 1.4 - 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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