PT-2021-21092 · Plesk · Plesk Obsidian

Iambouali · Published 2021-09-10 · Updated 2021-11-28 · CVE-2021-35976

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: Plesk Obsidian versions 18.0.0 through 18.0.32

Description: The feature to preview a website in Plesk Obsidian is vulnerable to reflected XSS via the "/plesk-site-preview/" PATH. An 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 this issue.

Recommendations: For Plesk Obsidian versions 18.0.0 through 18.0.32, consider disabling the website preview feature until a patch is available to prevent exploitation. Restrict access to the "/plesk-site-preview/" PATH to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-35976

Affected Products

Plesk Obsidian

References · 7

• 🔥 https://tarekbouali.com/cves/cve-2021-35976 · Exploit
• https://osv.dev/vulnerability/CVE-2021-35976 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-35976 · Security Note
• https://support.plesk.com/hc/en-us/articles/4402990507026 · Vendor Advisory
• https://bouali.io/cves/cve-2021-35976 · Note
• https://t.me/cibsecurity/28660 · Telegram Post
• https://t.me/cvenotify/20759 · Telegram Post