CVE-2021-39310: The Real WYSIWYG WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of PHP_SELF i

Q: How do I fix CVE-2021-39310?

real wysiwyg: upgrade to newer than 0.0.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-39310 being exploited?

CVE-2021-39310 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-2021-39310 affect?

CVE-2021-39310 affects real wysiwyg. Severity is medium (CVSS 6.1). The Real WYSIWYG WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of PHP_SELF in the ~/real-wysiwyg.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.0.2.

Q: How urgent is CVE-2021-39310?

Priority 35/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2021-39310 is a medium-severity flaw (CVSS 6.1) affecting real wysiwyg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Real WYSIWYG WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of PHP_SELF in the ~/real-wysiwyg.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.0.2.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-12-14
Last modified	2026-06-17

Publisher (CNA): Wordfence · Vendor: windyroad

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

Am I affected?

Timeline

2021-12-14 16:15 UTCPublished CVE record published
2026-06-17 04:03 UTCUpdated Record last modified

windyroad real wysiwyg UPGRADE

Affected: <= 0.0.2

Fixed in: newer than 0.0.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy real-wysiwyg || rpm -q real-wysiwyg || real-wysiwyg --version

2. UPGRADE to newer than 0.0.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade real-wysiwyg

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade real-wysiwyg

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-2021-39310?

real wysiwyg: upgrade to newer than 0.0.2. Exact commands for each OS are on this page.

Is CVE-2021-39310 being exploited?

CVE-2021-39310 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-2021-39310 affect?

CVE-2021-39310 affects real wysiwyg. Severity is medium (CVSS 6.1). The Real WYSIWYG WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of PHP_SELF in the ~/real-wysiwyg.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.0.2.

How urgent is CVE-2021-39310?

Priority 35/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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