What’s Vulnerable › Vulnerabilities

CVE-2021-35976

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-10 · updated 2026-06-17
• Weakness: CWE-79

Description

The feature to preview a website in Plesk Obsidian 18.0.0 through 18.0.32 on Linux is vulnerable to reflected XSS via the /plesk-site-preview/ PATH, aka PFSI-62467. The attacker could execute JavaScript code in the victim's browser by using the link to preview sites hosted on the server. Authentication is not required to exploit the vulnerability.

Affected products

• Plesk Obsidian: from 18.0.0 through 18.0.32

References

• https://support.plesk.com/hc/en-us/articles/4402990507026
• https://tarekbouali.com/cves/cve-2021-35976
• https://www.bouali.io/cves/cve-2021-35976
• https://support.plesk.com/hc/en-us/articles/4402990507026
• https://tarekbouali.com/cves/cve-2021-35976
• https://www.bouali.io/cves/cve-2021-35976

Get alerted when CVE-2021-35976 or the next vulnerability affects your stack