CVE-2026-22209: wpDiscuz before 7.6.47 contains a cross-site scripting vulnerability in the customCss field that allows admini

Q: How do I fix CVE-2026-22209?

wpdiscuz: upgrade to 7.6.47. Exact commands for each OS are on this page.

Q: Is CVE-2026-22209 being exploited?

CVE-2026-22209 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-22209 affect?

CVE-2026-22209 affects wpdiscuz. Severity is medium (CVSS 5.5). wpDiscuz before 7.6.47 contains a cross-site scripting vulnerability in the customCss field that allows administrators to inject malicious scripts by breaking out of style tags. Attackers with admin access can inject payloads like <

Q: How urgent is CVE-2026-22209?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2026-22209 is a medium-severity flaw (CVSS 5.5) affecting wpdiscuz. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

wpDiscuz before 7.6.47 contains a cross-site scripting vulnerability in the customCss field that allows administrators to inject malicious scripts by breaking out of style tags. Attackers with admin access can inject payloads like </style><script>alert(1)</script> in the custom CSS setting to execute arbitrary JavaScript in user browsers.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-13
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: gvectors

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

Am I affected?

Timeline

2026-03-13 19:54 UTCPublished CVE record published
2026-06-17 10:19 UTCUpdated Record last modified

gvectors wpdiscuz UPGRADE

Affected: < 7.6.47

Fixed in: 7.6.47

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 7.6.47 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wpdiscuz

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wpdiscuz

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-22209?

wpdiscuz: upgrade to 7.6.47. Exact commands for each OS are on this page.

Is CVE-2026-22209 being exploited?

CVE-2026-22209 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-2026-22209 affect?

CVE-2026-22209 affects wpdiscuz. Severity is medium (CVSS 5.5). wpDiscuz before 7.6.47 contains a cross-site scripting vulnerability in the customCss field that allows administrators to inject malicious scripts by breaking out of style tags. Attackers with admin access can inject payloads like </style><

How urgent is CVE-2026-22209?

Priority 23/100. No elevated risk signals yet.

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References

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