CVE-2019-16520

The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is...

5.4 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

1.53%Up 0.1 points since Apr 14, 2021

What each source reports

NVD Score used 5.4

Record: CVE-2019-16520
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 3.5 LowAV:N/AC:M/Au:S/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-16520
Updated: 2026-11-02

EUVDEUVD-2019-7197 No score

Record: EUVD-2019-7197
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m78p-fvq8-rg9f 5.4

The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is...

Record: GHSA-m78p-fvq8-rg9f
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSV 5.4

Record: CVE-2019-16520
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

Affected products

semperplugins all in one seo pack

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-16520 is a medium vulnerability (CVSS 5.4) in Semperplugins All In One Seo Pack, published October 16, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.53%, the 74th percentile. No source names a fixed version.