Technical Questions

Plesk Service/Interface

• What does Imunify notifications do in Plesk?
• PHP settings do not apply on a domain when CageFS is enabled in CloudLinux
• [CVE-2025-66431] Security vulnerability in domain creation mechanism allows Plesk users to execute arbitrary code on behalf of root
• Generating CSR certificate under AlmaLinux 9 and AlmaLinux 10 does not save the Country, City and other fields from SSL certificate settings section
• Plesk update fails: bind9 package is half-configured
• Wrong $_SERVER['HTTP_HOST'] and $_SERVER['SERVER_NAME'] using Default Site in IP Addresses
• See all 695 articles

Other

• How to monitor usage of system resources in a period of time using atop
• How to diagnose a DoS/DDoS attack and find websites under attack on a Plesk server
• Vulnerability CVE-2026-9256
• Why does an SSL certificate expire before the subscription period ends?
• Vulnerability CVE-2026-43284: Dirty Frag
• Vulnerability CVE-2026-31431: Copy Fail
• See all 487 articles

Webserver

• Websites on PHP-FPM are unavailable or loading slowly: server reached max_children setting (*), consider raising it
• Apache keeps going down on a Plesk server: server reached MaxRequestWorkers setting
• Vulnerability: CVE-2026-42945: DoS and RCE in nginx before 1.31.1/1.30.1
• Is Plesk affected by CVE-2026-23918? (Double Free and possible RCE in Apache http2 module)
• Preferred domain redirect does not work when Nginx is not installed in Plesk
• What do the HTTP status codes that you see in Plesk server logs mean in general?
• See all 524 articles

Applications & Extensions

• How to manage Plesk extensions (install, disable, remove, update)
• What DDoS protection tools are available in Plesk
• What to do if a WordPress website is hacked or infected?
• Grafana Alerts and Thresholds are not available
• How to hide the SecurityRisk score label in Wordpress Toolkit for Plesk?
• Imunify360 packages fail to update in Plesk: Failed to fetch (404 Not Found)
• See all 688 articles

Backup, Restore & Migration

• Plesk backup task finishes with the warning: Could not back up all data from the directory '/var/qmail/mailnames/example.com'
• Best Practices for Plesk and Server Backups
• Plesk backups to cloud storage fails: Unable to create the remote backup: assign: Bad file descriptor
• Cannot restore Plesk backup on Almalinux 10: Fatal error: plesk::mail::postfix::PostfixConfigurationError(postmap: fatal: lmdb:/var/spool/postfix/plesk/virtual
• Unable access active migration session in Plesk: version_compare(): Argument #1 ($version1) must be of type string, array given.
• Acronis Backup: Failed to install the backup agent. For details, see /var/log/trueimage-setup.log
• See all 382 articles

Databases

• How to troubleshoot slow performance of MySQL/MariaDB on a Plesk server?
• Vulnerability in Plesk’s MS SQL database user password update mechanism
• MSSQL 'sa' user locked out: Login failed for user 'sa'
• Can't install MariaDB in Plesk Windows: FATAL ERROR: Can't create data directory 'N:\MySQL-Data' (one or more intermediate directories do not exist)
• Unable to log in to Plesk: Table 'psa.smb_componentUpdates' doesn't exist in engine
• Cannot see remote MySQL/MariaDB database in Plesk Customer Panel
• See all 258 articles

Installation & Upgrade

• How to update Plesk Obsidian to the latest build
• MariaDB upgrade via Plesk interface fails: curl: (28) Operation timed out after 15000 milliseconds with 0 bytes received
• Plesk Update fails with errors: Integrity constraint violation: 1062 Duplicate entry db_name db\_name' for key 'PRIMARY'
• Package update fails on a Plesk server: ERROR: Transaction test error: Index.xml from install of mysql-common conflicts with file from package MariaDB-common
• Unable to install Microsoft Web Deploy on Windows 2025 with Plesk: Feature name MicrosoftWindowsPowerShellV2 is unknown
• The "plesk repair" utilities show warnings on Debian-based systems: Cannot find deb-archive for package
• See all 269 articles

Mail

• How to exclude a domain from DMARC check in Plesk for Linux
• SpamAssassin rules can't be updated on CentOS 7 server with Plesk: config: SpamAssassin failed to parse line, is not valid for "util_rb_3tld"
• Is Roundcube 1.4 secured against CVE-2026-25916 and CVE-2026-26079 in Plesk?
• Integrating SmarterMail 100.0.9560 with Plesk fails: Login failure: Missing auth
• Dovecot IMAP crashes on a Plesk server with Ubuntu 24.04: Panic: file imap-sieve-storage.c: line 216 (imap_sieve_add_mailbox_event): assertion failed
• Unable to start Amavis: ERROR: MISSING REQUIRED ADDITIONAL MODULES: DBD::MariaDB
• See all 550 articles

DNS & Statistics

• Why was AWStats deprecated, what tool replaces it, and what happens to existing servers and domains that still use AWStats?
• AWStats traffic significantly differs from Plesk traffic stats in a domain
• How to enable the local DNS zone for a Plesk domain?
• DNS bind service fails on a Plesk server after recent bind package update: loading from master file /var/named/chroot/var/0.13.203.in-addr.arpa.next failed: too many records
• How to track which file is being most downloaded on a website on a Plesk server?
• Why is it not possible to add a DS record to a root domain in Plesk?
• See all 138 articles

Website Builder

• Plesk Sitejet domain fail to publish with permissions error for .well-known directory: filemng: Error occurred during /bin/rm command.
• Sitejet Builder can not be opened for a Plesk domain: Error: Could not connect to Website Builder API
• Error opening Site Builder: pm_Exception: You don't have permission to perform this action
• Plesk Sitejet Builder editing error: Can not access Sitejet Website Builder for this domain after migration.
• Unable to publish website created in Web Presence Builder: APIv1 is deprecated. Please, switch to the new APIv3
• Unable to find Web Presence Builder in Plesk Installer
• See all 24 articles