PT-2021-3338 · 3S Smart Software Solutions · Codesys V2 Web-Server

Anton Dorfman + 1 · Published 2021-05-25 · Updated 2025-08-15 · CVE-2021-30190

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions CODESYS V2 Web-Server versions prior to 1.1.9.20

Description The issue is related to improper access control in the CODESYS V2 Web-Server, which can be exploited by a remote attacker to impact the confidentiality, integrity, and availability of protected information. This is due to errors in security settings.

Recommendations For versions prior to 1.1.9.20, update to version 1.1.9.20 or later to resolve the issue. As a temporary workaround, consider restricting access to the web server to minimize the risk of exploitation.

Exploit

Fix

Missing Authentication

Exposure of Resource to Wrong Sphere

Weakness Enumeration

CWE-306

CWE-668

Related Identifiers

BDU:2021-03147

CVE-2021-30190

Affected Products

Codesys V2 Web-Server

References · 9

• 🔥 https://github.com/AbdulRKB/Follina · Exploit
• 🔥 https://github.com/CyberTitus/Follina · Exploit
• https://osv.dev/vulnerability/CVE-2021-30190 · Vendor Advisory
• https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14726&token=553da5d11234bbe1ceed59969d419a71bb8c8747&download= · Vendor Advisory
• https://customers.codesys.com/index.php · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-30190 · Security Note
• https://bdu.fstec.ru/vul/2021-03147 · Security Note
• https://xakep.ru/2021/06/04/codesys-flaws · Note
• https://t.me/cveNotify/132543 · Telegram Post