CVE-2020-18184: In PluxXml V5.7,the theme edit function /PluXml/core/admin/parametres_edittpl.php allows remote attackers to e

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HIGH 7.2DOWNGRADE

CVE-2020-18184 is a high-severity flaw (CVSS 7.2) affecting pluxxml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In PluxXml V5.7,the theme edit function /PluXml/core/admin/parametres_edittpl.php allows remote attackers to execute arbitrary PHP code by placing this code into a template.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Published	2020-10-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pluxxml

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

Am I affected?

Timeline

2020-10-02 13:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

pluxxml pluxxml DOWNGRADE

Affected: 5.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.7 (Debian / Ubuntu)

apt-cache madison pluxxml sudo apt install pluxxml=<VERSION_BEFORE_5.7> sudo apt-mark hold pluxxml

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

dnf --showduplicates list pluxxml sudo dnf downgrade pluxxml-<VERSION_BEFORE_5.7> sudo dnf versionlock add pluxxml

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-2020-18184?

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

Is CVE-2020-18184 being exploited?

CVE-2020-18184 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-2020-18184 affect?

CVE-2020-18184 affects pluxxml. Severity is high (CVSS 7.2). In PluxXml V5.7,the theme edit function /PluXml/core/admin/parametres_edittpl.php allows remote attackers to execute arbitrary PHP code by placing this code into a template.

How urgent is CVE-2020-18184?

Priority 48/100. High severity; Public exploit reference

Software pages

PHP vulnerabilities

References

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