CVE-2023-0829: Cross-Site Scripting (XSS) vulnerability in Plesk

Severity: critical (CVSS 9.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-20 · updated 2026-06-17
Weakness: CWE-79

Description

Plesk 17.0 through 18.0.31 version, is vulnerable to a Cross-Site Scripting. A malicious subscription owner (either a customer or an additional user), can fully compromise the server if an administrator visits a certain page in Plesk related to the malicious subscription.

Affected products

Plesk: from 17.0 through 18.0.31

References

https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-xss-vulnerability-plesk
https://www.incibe.es/en/incibe-cert/notices/aviso/cross-site-scripting-xss-vulnerability-plesk

Get alerted when CVE-2023-0829 or the next vulnerability affects your stack