CVE-2016-10999: The Goodnews theme through 2016-02-28 for WordPress has XSS via the s parameter.

This month

MEDIUM 6.1DOWNGRADE

CVE-2016-10999 is a medium-severity flaw (CVSS 6.1) affecting goodnews. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Goodnews theme through 2016-02-28 for WordPress has XSS via the s parameter.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-09-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: momizat

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

Am I affected?

Timeline

2019-09-20 15:15 UTCPublished CVE record published
2026-06-17 00:40 UTCUpdated Record last modified

momizat goodnews DOWNGRADE

Affected: 2016-02-28

Fixed in: no fixed release known

Safe to downgrade to: a release before 2016-02-28

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2016-02-28 (Debian / Ubuntu)

apt-cache madison goodnews sudo apt install goodnews=<VERSION_BEFORE_2016-02-28> sudo apt-mark hold goodnews

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

dnf --showduplicates list goodnews sudo dnf downgrade goodnews-<VERSION_BEFORE_2016-02-28> sudo dnf versionlock add goodnews

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-2016-10999?

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

Is CVE-2016-10999 being exploited?

CVE-2016-10999 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-2016-10999 affect?

CVE-2016-10999 affects goodnews. Severity is medium (CVSS 6.1). The Goodnews theme through 2016-02-28 for WordPress has XSS via the s parameter.

How urgent is CVE-2016-10999?

Priority 42/100. Public exploit reference

Software pages

WordPress vulnerabilities

References

← Back to latest CVEs