PT-2021-12718 · Nextcloud · Nextcloud Contacts

Published 2021-01-06 · Updated 2021-01-11 · CVE-2020-8281

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: Nextcloud Contacts version 3.3.0

Description: A missing file type check in Nextcloud Contacts allows a malicious user to upload malicious SVG files to perform cross-site scripting (XSS) attacks.

Recommendations: For Nextcloud Contacts version 3.3.0, update to a version that includes a fix for the missing file type check to prevent cross-site scripting (XSS) attacks. As a temporary workaround, consider restricting the upload of SVG files until a patch is available.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2020-8281

Affected Products

Nextcloud Contacts

References · 6

• 🔥 https://hackerone.com/reports/894876 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-8281 · Security Note
• https://osv.dev/vulnerability/CVE-2020-8281 · Vendor Advisory
• https://nextcloud.com/security/advisory/?id=NC-SA-2020-045 · Vendor Advisory
• https://t.me/cvenotify/8230 · Telegram Post
• https://t.me/cibsecurity/21722 · Telegram Post