CVE-2021-36545: Cross Site Scripting (XSS) vulnerability in tpcms 3.2 allows remote attackers to run arbitrary code via the cf

Routine

MEDIUM 5.4DOWNGRADE

CVE-2021-36545 is a medium-severity flaw (CVSS 5.4) affecting tpcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in tpcms 3.2 allows remote attackers to run arbitrary code via the cfg_copyright or cfg_tel field in Site Configuration page.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tpcms project

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

tpcms project tpcms DOWNGRADE

Affected: 3.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.2 (Debian / Ubuntu)

apt-cache madison tpcms sudo apt install tpcms=<VERSION_BEFORE_3.2> sudo apt-mark hold tpcms

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

dnf --showduplicates list tpcms sudo dnf downgrade tpcms-<VERSION_BEFORE_3.2> sudo dnf versionlock add tpcms

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-2021-36545?

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

Is CVE-2021-36545 being exploited?

CVE-2021-36545 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-2021-36545 affect?

CVE-2021-36545 affects tpcms. Severity is medium (CVSS 5.4). Cross Site Scripting (XSS) vulnerability in tpcms 3.2 allows remote attackers to run arbitrary code via the cfg_copyright or cfg_tel field in Site Configuration page.

How urgent is CVE-2021-36545?

Priority 35/100. Public exploit reference

Related CVEs

CVE-2021-36544 HIGH 7.5 DOWNGRADE Incorrect Access Control issue discovered in tpcms 3.2 allows remote attackers to view sensitive information v

References

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