PT-2021-23630 · Unknown · Cryptshare

Luna Krone · Published 2021-11-30 · Updated 2021-12-01 · CVE-2021-42564

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 Cryptshare versions prior to 5.1.0

Description The issue allows remote attackers with permission to provide confidential messages via Cryptshare to redirect targeted victims to any URL. This is achieved through an open redirect via HTML injection in confidential messages, utilizing the '' substring in the editor parameter.

Recommendations For versions prior to 5.1.0, update to version 5.1.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of the editor parameter in confidential messages to minimize the risk of exploitation.

Exploit

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2021-42564

Affected Products

Cryptshare

References · 4

• 🔥 https://syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-057.txt · Exploit
• https://osv.dev/vulnerability/CVE-2021-42564 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42564 · Security Note
• https://t.me/cibsecurity/33132 · Telegram Post