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Public proof of conceptFix available

CVE-2022-21663

A public proof of concept exists; no exploitation attested.

  • Published2022-01-06
  • Fixed in5.8.3
  • WeaknessCWE-502 · CWE-74

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

WordPress is a free and open-source content management system written in PHP and paired with a MariaDB database. On a multisite, users with Super Admin role can bypass explicit/additional hardening under certain conditions through object injection. This has been patched in WordPress version 5.8.3. Older affected versions are also fixed via security release, that go back till 3.7.37. We strongly recommend that you keep auto-updates enabled. There are no known workarounds for this issue.

Timeline

dates in UTC
  1. 2022-01-0623:15CVE publishedNVD

Versions per branch

NVD · OSV
WordPress
BranchAffectedFixed in
5.8< 5.8.35.8.3
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
11.0= 11.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
34.x= 34no fix published
35.x= 35no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • wordpress-develop
    Affected
    • = < 5.8.3no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-07-28

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • wordpressUbuntu:20.04:LTSall versions · no fixed version listed
  • wordpressUbuntu:18.04:LTSall versions · no fixed version listed
  • wordpressUbuntu:16.04:LTSall versions · no fixed version listed
  • wordpressDebian:14all versions · fixed in 5.8.3+dfsg1-1
  • wordpressDebian:13all versions · fixed in 5.8.3+dfsg1-1
  • wordpressDebian:12all versions · fixed in 5.8.3+dfsg1-1
  • wordpressDebian:11all versions · fixed in 5.7.5+dfsg1-0+deb11u1
  • wordpressDebian:10all versions · fixed in 5.0.15+dfsg1-0+deb10u1

1 more package range on OSV.dev

Vendor advisories

  • CVE-2022-21663 Red Hat Product Security

    wordpress: authenticated object injection in multisites

Full record on NVD

Fix

  1. Update WordPress to 5.8.3

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-04-22
  • CNACVSS 3.16.6known since 2026-10-23
  • NVDCVSS 3.17.2read 2026-10-23
  • NVDCVSS 2.06.5read 2026-10-23
  • CNAweakness (CWE)CWE-74known since 2026-10-23
  • NVDweakness (CWE)CWE-502read 2026-10-23
  • FIRST EPSSEPSS score3.8 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published
2022-01-06
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-jmmq-m8p8-332h

Frequently asked questions

What is CVE-2022-21663?

WordPress is a free and open-source content management system written in PHP and paired with a MariaDB database. On a multisite, users with Super Admin role can bypass explicit/additional hardening under certain conditions through object injection. This has been patched in WordPress version 5.8.3. Older affected versions are also fixed via security release, that go back till 3.7.37. We strongly recommend that you keep auto-updates enabled. There are no known workarounds for this issue.

Is CVE-2022-21663 actively exploited?

A proof-of-concept exploit exists for CVE-2022-21663, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2022-21663?

CVE-2022-21663 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record