CVE-2015-9477: The Vernissage theme 1.2.8 for WordPress has insufficient restrictions on option updates.

This month

HIGH 8.8DOWNGRADE

CVE-2015-9477 is a high-severity flaw (CVSS 8.8) affecting vernissage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Vernissage theme 1.2.8 for WordPress has insufficient restrictions on option updates.

Why this priority

High severity

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	Low
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-276
Published	2019-10-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: vernissage project

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

Am I affected?

Timeline

2019-10-10 17:15 UTCPublished CVE record published
2026-06-17 00:36 UTCUpdated Record last modified

vernissage project vernissage DOWNGRADE

Affected: 1.2.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.8

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.8 (Debian / Ubuntu)

apt-cache madison vernissage sudo apt install vernissage=<VERSION_BEFORE_1.2.8> sudo apt-mark hold vernissage

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

dnf --showduplicates list vernissage sudo dnf downgrade vernissage-<VERSION_BEFORE_1.2.8> sudo dnf versionlock add vernissage

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-2015-9477?

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

Is CVE-2015-9477 being exploited?

CVE-2015-9477 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-2015-9477 affect?

CVE-2015-9477 affects vernissage. Severity is high (CVSS 8.8). The Vernissage theme 1.2.8 for WordPress has insufficient restrictions on option updates.

How urgent is CVE-2015-9477?

Priority 49/100. High severity

Software pages

WordPress vulnerabilities

References

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