CVE-2021-32543Network attack vector

Account impersonation via unchecked cookie authorization

Published May 28, 2021 · Updated Sep 16, 2024

Improper authentication in SysJust CTS Web before 2021.3.24 allows remote authenticated users to impersonate accounts via cookie tampering. CTS Web trusts an authenticated client's manipulated cookie without validating that the session is authorized for the account the cookie identifies. A valid low-privilege login is required; successful abuse exposes another account's privileges and permits stock-market orders under that identity.

CVSS severity5.4
Medium
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper authentication in SysJust CTS Web before 2021.3.24 allows remote authenticated users to impersonate accounts via cookie tampering. CTS Web trusts an authenticated client's manipulated cookie without validating that the session is authorized for the account the cookie identifies. A valid low-privilege login is required; successful abuse exposes another account's privileges and permits stock-market orders under that identity.

The record

CVE
CVE-2021-32543
Published
May 28, 2021
Updated
Sep 16, 2024
Vendor
SysJust
Product
CTS Web
Classifications
CWE-287, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=released 2021.3.25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SysJust · CTS Webversion=unspecified <=released 2021.3.25

Published CVSS scores

6.5TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
5.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo