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TSR 2013-0012 Announcement


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cPanel has released new builds for all public update tiers. These updates provide targeted changes to address security concerns with the cPanel & WHM product. These builds are currently available to all customers via the standard update system.

cPanel has rated these updates as having security impact levels of Important.

Information on cPanel’s security ratings is available at http://go.cpanel.net/securitylevels.

If your deployed cPanel & WHM servers are configured to automatically update when new releases are available, then no action is required. Your systems will update automatically. If you have disabled automatic updates, then we strongly encourage you to update your cPanel & WHM installations at your earliest convenience.


The following cPanel & WHM versions address all known vulnerabilities:

* & Greater
* & Greater
* & Greater
* & Greater

The latest public releases of cPanel & WHM for all update tiers are available at http://httpupdate.cpanel.net.


During a routine code audit, an issue was discovered by the cPanel Product Security team. Later the same issue was reported by an external security researcher. Due to an unfortunate set of circumstances, the external researcher disclosed information about the issue on a public website.

While cPanel does not believe the vulnerability is being actively exploited, we felt it to be in our customers best interest to publish an unscheduled security release.

Once sufficient time has passed, allowing cPanel & WHM systems to automatically update to the new versions, cPanel will release additional information about the nature of the security issue.

Additional information is scheduled for release on December 23, 2013.

For information on cPanel & WHM Versions and the Release Process, read our documentation at: http://go.cpanel.net/versionformat

For the PGP-signed message, see TSA-2013-0012-signed

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