CVE-2015-6805: Cross-site scripting (XSS) vulnerability in the MDC Private Message plugin 1.0.0 for WordPress allows remote a

Routine

LOW 3.5DOWNGRADE

CVE-2015-6805 is a low-severity flaw (CVSS 3.5) affecting mdc private message. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in the MDC Private Message plugin 1.0.0 for WordPress allows remote authenticated users to inject arbitrary web script or HTML via the message field in a private message.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	3.5 (Low)
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-79
Published	2015-09-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: medhabidotcom

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

Am I affected?

Timeline

2015-09-02 14:59 UTCPublished CVE record published
2026-06-17 00:31 UTCUpdated Record last modified

medhabidotcom mdc private message DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy mdc-private-message || rpm -q mdc-private-message || mdc-private-message --version

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison mdc-private-message sudo apt install mdc-private-message=<VERSION_BEFORE_1.0.0> sudo apt-mark hold mdc-private-message

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

dnf --showduplicates list mdc-private-message sudo dnf downgrade mdc-private-message-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add mdc-private-message

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: WordPress Plugin MDC Private Message 1.0.0 - Persistent Cross-Site Scripting

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-2015-6805?

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

Is CVE-2015-6805 being exploited?

CVE-2015-6805 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-2015-6805 affect?

CVE-2015-6805 affects mdc private message. Severity is low (CVSS 3.5). Cross-site scripting (XSS) vulnerability in the MDC Private Message plugin 1.0.0 for WordPress allows remote authenticated users to inject arbitrary web script or HTML via the message field in a private message.

How urgent is CVE-2015-6805?

Priority 38/100. Public exploit reference

Software pages

WordPress vulnerabilities

References

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