CVE-2015-5483: Multiple cross-site request forgery (CSRF) vulnerabilities in the Private Only plugin 3.5.1 for WordPress allo

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HIGH 8.8DOWNGRADE

CVE-2015-5483 is a high-severity flaw (CVSS 8.8) affecting private only. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple cross-site request forgery (CSRF) vulnerabilities in the Private Only plugin 3.5.1 for WordPress allow remote attackers to hijack the authentication of administrators for requests that (1) add users, (2) delete posts, or (3) modify PHP files via unspecified vectors, or (4) conduct cross-site scripting (XSS) attacks via the po_logo parameter in the privateonly.php page to wp-admin/options-general.php.

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	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-352
Published	2020-01-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: private only project

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

Am I affected?

Timeline

2020-01-28 20:15 UTCPublished CVE record published
2026-06-17 00:29 UTCUpdated Record last modified

private only project private only DOWNGRADE

Affected: 3.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.1

1. Check installed version

apt-cache policy private-only || rpm -q private-only || private-only --version

2. No fixed release: DOWNGRADE to a release before 3.5.1 (Debian / Ubuntu)

apt-cache madison private-only sudo apt install private-only=<VERSION_BEFORE_3.5.1> sudo apt-mark hold private-only

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

dnf --showduplicates list private-only sudo dnf downgrade private-only-<VERSION_BEFORE_3.5.1> sudo dnf versionlock add private-only

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-2015-5483?

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

Is CVE-2015-5483 being exploited?

CVE-2015-5483 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-2015-5483 affect?

CVE-2015-5483 affects private only. Severity is high (CVSS 8.8). Multiple cross-site request forgery (CSRF) vulnerabilities in the Private Only plugin 3.5.1 for WordPress allow remote attackers to hijack the authentication of administrators for requests that (1) add users, (2) delete posts, or (3) modify

How urgent is CVE-2015-5483?

Priority 55/100. High severity; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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