CVE-2020-18451: Cross Site Scripting (XSS) vulnerability exists in DamiCMS v6.0.6 via the title parameter in the doadd functio

Routine

MEDIUM 4.8DOWNGRADE

CVE-2020-18451 is a medium-severity flaw (CVSS 4.8) affecting damicms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability exists in DamiCMS v6.0.6 via the title parameter in the doadd function in LabelAction.class.php.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-08-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: damicms

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

Am I affected?

Timeline

2021-08-12 18:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

damicms damicms DOWNGRADE

Affected: 6.0.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 6.0.6 (Debian / Ubuntu)

apt-cache madison damicms sudo apt install damicms=<VERSION_BEFORE_6.0.6> sudo apt-mark hold damicms

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

dnf --showduplicates list damicms sudo dnf downgrade damicms-<VERSION_BEFORE_6.0.6> sudo dnf versionlock add damicms

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-2020-18451?

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

Is CVE-2020-18451 being exploited?

CVE-2020-18451 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-2020-18451 affect?

CVE-2020-18451 affects damicms. Severity is medium (CVSS 4.8). Cross Site Scripting (XSS) vulnerability exists in DamiCMS v6.0.6 via the title parameter in the doadd function in LabelAction.class.php.

How urgent is CVE-2020-18451?

Priority 33/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-21236 HIGH 8.8 DOWNGRADE A vulnerability in /damicms-master/admin.php?s=/Article/doedit of DamiCMS v6.0 allows attackers to compromise
CVE-2020-18458 HIGH 8.0 DOWNGRADE Cross Site Request Forgery (CSRF) vulnerability exists in DamiCMS v6.0.6 that can add an admin account via adm

References

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