CVE-2019-16520: The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored X

Q: How do I fix CVE-2019-16520?

all in one seo pack: upgrade to 3.2.7. Exact commands for each OS are on this page.

Q: Is CVE-2019-16520 being exploited?

CVE-2019-16520 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-2019-16520 affect?

CVE-2019-16520 affects all in one seo pack. Severity is medium (CVSS 5.4). The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored XSS due to improper encoding of the SEO-specific description for posts provided by the plugin via unsafe placeholder replacement.

Q: How urgent is CVE-2019-16520?

Priority 43/100. Public exploit reference

This month

MEDIUM 5.4UPGRADE

CVE-2019-16520 is a medium-severity flaw (CVSS 5.4) affecting all in one seo pack. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored XSS due to improper encoding of the SEO-specific description for posts provided by the plugin via unsafe placeholder replacement.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-79
Published	2019-10-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: semperplugins

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

Am I affected?

Timeline

2019-10-16 14:15 UTCPublished CVE record published
2026-06-17 02:22 UTCUpdated Record last modified

semperplugins all in one seo pack UPGRADE

Affected: < 3.2.7

Fixed in: 3.2.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy all-in-one-seo-pack || rpm -q all-in-one-seo-pack || all-in-one-seo-pack --version

2. UPGRADE to 3.2.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade all-in-one-seo-pack

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade all-in-one-seo-pack

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-2019-16520?

all in one seo pack: upgrade to 3.2.7. Exact commands for each OS are on this page.

Is CVE-2019-16520 being exploited?

CVE-2019-16520 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-2019-16520 affect?

CVE-2019-16520 affects all in one seo pack. Severity is medium (CVSS 5.4). The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored XSS due to improper encoding of the SEO-specific description for posts provided by the plugin via unsafe placeholder replacement.

How urgent is CVE-2019-16520?

Priority 43/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2020-35946 MEDIUM 5.4 UPGRADE An issue was discovered in the All in One SEO Pack plugin before 3.6.2 for WordPress
CVE-2015-0902 MEDIUM 5.0 UPGRADE The Semper Fi All in One SEO Pack plugin before 2.2.6 for WordPress does not consider the presence of password
CVE-2013-5988 MEDIUM 6.1 UPGRADE A Cross-site Scripting (XSS) vulnerability exists in the All in One SEO Pack plugin before 2.0.3.1 for WordPre

References

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