PT-2020-18727 · Umbraco · Umbraco Cms

Evan Grant · Published 2020-12-30 · Updated 2021-01-04 · CVE-2020-5810

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Umbraco CMS versions prior to 8.9.2

Description A stored XSS issue exists, allowing an authenticated user with media upload permissions to upload a malicious .svg file that acts as a stored XSS payload.

Recommendations For Umbraco CMS versions prior to 8.9.2, update to version 8.9.2 or later to resolve the issue. As a temporary workaround, consider restricting media upload permissions to trusted users until the update is applied.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2020-5810

Affected Products

Umbraco Cms

References · 3

• 🔥 https://tenable.com/security/research/tra-2020-59 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-5810 · Security Note
• https://osv.dev/vulnerability/CVE-2020-5810 · Vendor Advisory