CVE-2021-32542: The parameters of the specific functions in the CTS Web trading system do not filter special characters, which

Q: How do I fix CVE-2021-32542?

cts web: upgrade to 2021.3.24. Exact commands for each OS are on this page.

Q: Is CVE-2021-32542 being exploited?

CVE-2021-32542 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-32542 affect?

CVE-2021-32542 affects cts web. Severity is medium (CVSS 4.7). The parameters of the specific functions in the CTS Web trading system do not filter special characters, which allows unauthenticated attackers can remotely perform reflected XSS and obtain the users’ connection token that triggered the att

Q: How urgent is CVE-2021-32542?

Priority 30/100. No elevated risk signals yet.

Routine

MEDIUM 4.7UPGRADE

CVE-2021-32542 is a medium-severity flaw (CVSS 4.7) affecting cts web. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The parameters of the specific functions in the CTS Web trading system do not filter special characters, which allows unauthenticated attackers can remotely perform reflected XSS and obtain the users’ connection token that triggered the attack.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-05-28
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: sysjust

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-05-28 08:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

sysjust cts web UPGRADE

Affected: < 2021.3.24

Fixed in: 2021.3.24

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cts-web || rpm -q cts-web || cts-web --version

2. UPGRADE to 2021.3.24 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cts-web

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cts-web

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-32542?

cts web: upgrade to 2021.3.24. Exact commands for each OS are on this page.

Is CVE-2021-32542 being exploited?

CVE-2021-32542 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-32542 affect?

CVE-2021-32542 affects cts web. Severity is medium (CVSS 4.7). The parameters of the specific functions in the CTS Web trading system do not filter special characters, which allows unauthenticated attackers can remotely perform reflected XSS and obtain the users’ connection token that triggered the att

How urgent is CVE-2021-32542?

Priority 30/100. No elevated risk signals yet.

Related CVEs

CVE-2021-32543 MEDIUM 6.5 UPGRADE The CTS Web transaction system related to authentication management is implemented incorrectly
CVE-2021-32541 MEDIUM 5.3 UPGRADE The CTS Web transaction system related to authentication and session management is implemented incorrectly, wh

References

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