CVE-2021-36443: Cross Site Request Forgery vulnerability in imcat 5.4 allows remote attackers to escalate privilege via lack o

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HIGH 8.8DOWNGRADE

CVE-2021-36443 is a high-severity flaw (CVSS 8.8) affecting imcat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Request Forgery vulnerability in imcat 5.4 allows remote attackers to escalate privilege via lack of token verification.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-352
Published	2023-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: txjia

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

Am I affected?

Timeline

2023-02-03 18:15 UTCPublished CVE record published
2026-06-17 03:58 UTCUpdated Record last modified

txjia imcat DOWNGRADE

Affected: 5.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.4

1. Check installed version

apt-cache policy imcat || rpm -q imcat || imcat --version

2. No fixed release: DOWNGRADE to a release before 5.4 (Debian / Ubuntu)

apt-cache madison imcat sudo apt install imcat=<VERSION_BEFORE_5.4> sudo apt-mark hold imcat

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list imcat sudo dnf downgrade imcat-<VERSION_BEFORE_5.4> sudo dnf versionlock add imcat

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-36443?

imcat: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-36443 being exploited?

CVE-2021-36443 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-2021-36443 affect?

CVE-2021-36443 affects imcat. Severity is high (CVSS 8.8). Cross Site Request Forgery vulnerability in imcat 5.4 allows remote attackers to escalate privilege via lack of token verification.

How urgent is CVE-2021-36443?

Priority 48/100. High severity; Public exploit reference

Related CVEs

CVE-2021-36444 HIGH 8.8 DOWNGRADE Cross Site Request Forgery (CSRF) vulnerability in imcat 5.4 allows remote attackers to gain escalated privile
CVE-2021-35370 CRITICAL 9.8 DOWNGRADE An issue found in Peacexie Imcat v5.4 allows attackers to execute arbitrary code via the incomplete filtering
CVE-2021-35369 MEDIUM 6.5 DOWNGRADE Arbitrary File Read vulnerability found in Peacexie ImCat v.5.2 fixed in v.5.4 allows attackers to obtain sens

References

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