Update - Our teams are nearing the completion of the W3 Total Cache (W3TC) plugin update rollout across all eligible sites. The majority of sites running vulnerable or outdated versions have already been successfully updated.
We are now finalizing reviews on the remaining sites where updates could not be automatically applied. In these cases, customer involvement may be required (for example, due to outdated PHP or WordPress versions, or access limitations). We will reach out directly to affected customers to review their hosting environment and update the plugin.
We continue to recommend that all customers review their sites and manually update the W3TC plugin to version 2.8.14 or higher, if it has not already been updated, as exploit details are now publicly available.
We’ll share a final update once this process is fully complete.
If you have any questions or concerns, please don't hesitate to contact our support team through a ticket in your portal or via live chat.
Dec 18, 2025 - 08:59 EST
We are now finalizing reviews on the remaining sites where updates could not be automatically applied. In these cases, customer involvement may be required (for example, due to outdated PHP or WordPress versions, or access limitations). We will reach out directly to affected customers to review their hosting environment and update the plugin.
We continue to recommend that all customers review their sites and manually update the W3TC plugin to version 2.8.14 or higher, if it has not already been updated, as exploit details are now publicly available.
We’ll share a final update once this process is fully complete.
If you have any questions or concerns, please don't hesitate to contact our support team through a ticket in your portal or via live chat.
Dec 18, 2025 - 08:59 EST
Update - As shared in our earlier update, our teams are continuing to roll out the W3 Total Cache (W3TC) plugin update on sites that meet the minimum requirements. We’ve already been able to successfully update many sites running vulnerable or outdated versions, and this work is still in progress across the fleet.
We’re also reviewing the remaining sites to determine where the update can be safely applied. In some cases, factors like outdated PHP/WordPress versions or limited server access may prevent the update from completing. For those situations, we will follow up directly with customers once our review is finished.
We still strongly encourage all customers to review their sites and manually update the W3TC plugin if needed, as details about the exploit have already been made public.
Further updates will be shared as progress continues.
Dec 10, 2025 - 15:10 EST
We’re also reviewing the remaining sites to determine where the update can be safely applied. In some cases, factors like outdated PHP/WordPress versions or limited server access may prevent the update from completing. For those situations, we will follow up directly with customers once our review is finished.
We still strongly encourage all customers to review their sites and manually update the W3TC plugin if needed, as details about the exploit have already been made public.
Further updates will be shared as progress continues.
Dec 10, 2025 - 15:10 EST
Update - We have successfully applied the W3 Total Cache (W3TC) plugin update to thousands of customer sites where an outdated installation was identified and the environment met the minimum requirements for the upgrade. Our teams are continuing to review the hosting fleet and will apply updates wherever possible.
In most cases, we are able to complete the update for our customers. However, several common blockers have prevented updates on some sites, including:
Outdated PHP versions (older than PHP 7.2.5)
Outdated WordPress installations (earlier than WordPress 5.3)
Restricted or limited server access
Once our update efforts are complete, we will contact customers whose environments contain a vulnerable W3TC installation that we were able to identify but could not be updated automatically, so that they and their teams can take any required remediation steps.
We strongly recommend that all customers review their hosting environments and update the plugin as soon as possible, as a proof-of-concept for the exploit has been publicly released.
Dec 02, 2025 - 16:17 EST
In most cases, we are able to complete the update for our customers. However, several common blockers have prevented updates on some sites, including:
Outdated PHP versions (older than PHP 7.2.5)
Outdated WordPress installations (earlier than WordPress 5.3)
Restricted or limited server access
Once our update efforts are complete, we will contact customers whose environments contain a vulnerable W3TC installation that we were able to identify but could not be updated automatically, so that they and their teams can take any required remediation steps.
We strongly recommend that all customers review their hosting environments and update the plugin as soon as possible, as a proof-of-concept for the exploit has been publicly released.
Dec 02, 2025 - 16:17 EST
Update - Our team is actively involved in updating the W3 Total Cache (W3TC) plugin to the latest version for all sites running W3TC version 2.8.13 or earlier, as part of the ongoing remediation for CVE-2025-9501.
We are closely monitoring all systems throughout this process to ensure the updates are applied successfully and to verify that there is no customer impact.
Further updates will be shared as progress continues.
Nov 21, 2025 - 08:04 EST
We are closely monitoring all systems throughout this process to ensure the updates are applied successfully and to verify that there is no customer impact.
Further updates will be shared as progress continues.
Nov 21, 2025 - 08:04 EST
Identified - Our team will be updating the W3 Total Cache (W3TC) plugin on WordPress sites where the installed version is lower than 2.8.13. This update addresses CVE-2025-9501, a critical security vulnerability.
A fixed version is available in W3TC 2.8.13 and later. To ensure the continued security and stability of your sites, our engineering team will apply this update.
We do not anticipate any downtime during this process.
No action is required on your part. Our team will monitor the update closely to ensure your sites remain fully functional. We appreciate your co-operation as we take this proactive step to protect your sites.
For additional details on the Vulnerability, please refer:
https://wpscan.com/vulnerability/6697a2c9-63ae-42f0-8931-f2e5d67d45ae/
If you encounter any issues after the update please contact our support team through a ticket in your portal or via live chat.
We will provide updates on the progress of the patching.
Nov 20, 2025 - 14:50 EST
A fixed version is available in W3TC 2.8.13 and later. To ensure the continued security and stability of your sites, our engineering team will apply this update.
We do not anticipate any downtime during this process.
No action is required on your part. Our team will monitor the update closely to ensure your sites remain fully functional. We appreciate your co-operation as we take this proactive step to protect your sites.
For additional details on the Vulnerability, please refer:
https://wpscan.com/vulnerability/6697a2c9-63ae-42f0-8931-f2e5d67d45ae/
If you encounter any issues after the update please contact our support team through a ticket in your portal or via live chat.
We will provide updates on the progress of the patching.
Nov 20, 2025 - 14:50 EST
Investigating - We are aware of an increase in email delivery issues affecting messages sent from Microsoft 365/Outlook to Premium Business email-hosted mailboxes. Some emails may bounce or be delayed due to Microsoft IP addresses appearing on the SenderScore blocklist.
If you are experiencing this issue, you can resolve it by safelisting Microsoft's sending IP addresses at the mailbox level:
1. Go to cp.rackspace.com > Domains > Spam settings > Safelists
2. Select your domain
3. Add the following IP ranges:
52.102.%.%
40.107.%.%
52.101.%.%
52.103.%.%
We are actively working with our partners to determine if fleet-wide mitigations can be applied. We will provide updates as more information becomes available.
If you have any questions or concerns, please don't hesitate to contact us via Live Chat or by opening a case.
Dec 16, 2025 - 17:16 EST
If you are experiencing this issue, you can resolve it by safelisting Microsoft's sending IP addresses at the mailbox level:
1. Go to cp.rackspace.com > Domains > Spam settings > Safelists
2. Select your domain
3. Add the following IP ranges:
52.102.%.%
40.107.%.%
52.101.%.%
52.103.%.%
We are actively working with our partners to determine if fleet-wide mitigations can be applied. We will provide updates as more information becomes available.
If you have any questions or concerns, please don't hesitate to contact us via Live Chat or by opening a case.
Dec 16, 2025 - 17:16 EST
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Scheduled Maintenance
Scheduled Network Maintenance, DC2 and DC3 Jan 3, 2026 21:00-22:00 EST
We will be performing scheduled network maintenance to apply updates that enhance the long-term performance, stability, and security of our infrastructure. During this window, our teams will also complete validation and testing to ensure all recent changes continue to operate as expected across our data center network systems.
No customer impact is expected during this maintenance period. All work is being performed under strict change controls and will be closely monitored by our engineering teams to ensure a smooth and seamless experience.
We appreciate your patience and understanding. If you need any assistance, our Support Team is available 24/7 via Live Chat or at support@liquidweb.com
Posted on Dec 05, 2025 - 12:25 EST
No customer impact is expected during this maintenance period. All work is being performed under strict change controls and will be closely monitored by our engineering teams to ensure a smooth and seamless experience.
We appreciate your patience and understanding. If you need any assistance, our Support Team is available 24/7 via Live Chat or at support@liquidweb.com
Posted on Dec 05, 2025 - 12:25 EST