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CVE-2022-21663

Authenticated Object Injection in Multisites in WordPress

6.6 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

3.82%Up 2.8 points since Feb 8, 2022
90%50%10%1%

What each source reports

CVE List Score used 6.6

Authenticated Object Injection in Multisites in WordPress

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.

Record
CVE-2022-21663
CVSS 3.1
6.6 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-74
Updated
2026-11-02
EUVDEUVD-2022-26880 6.6

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.

Record
EUVD-2022-26880
CVSS 3.1
6.6 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
NVD 6.6

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.

Record
CVE-2022-21663
CVSS 3.1
6.6 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
7.2 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness
CWE-74, CWE-502
Updated
2026-11-02
OSV 6.6

Authenticated Object Injection in Multisites in WordPress

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.

Record
CVE-2022-21663
CVSS 3.1
6.6 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-74
Updated
2026-11-02
OSVDEBIAN-CVE-2022-21663 7.2

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.

Record
DEBIAN-CVE-2022-21663
CVSS 3.1
7.2 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVUBUNTU-CVE-2022-21663 6.6

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.

Record
UBUNTU-CVE-2022-21663
CVSS 3.1
6.6 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1
7.2 HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVBIT-wordpress-2022-21663 No score

Authenticated Object Injection in Multisites in WordPress

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.

Record
BIT-wordpress-2022-21663
Updated
2026-11-02
OSVBIT-wordpress-multisite-2022-21663 No score

Authenticated Object Injection in Multisites in WordPress

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.

Record
BIT-wordpress-multisite-2022-21663
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
wordpress
Bitnami
 before 5.8.3
5.8.3
wordpress-multisite
Bitnami
 before 5.8.3
5.8.3
wordpress
Debian:12
 before 5.8.3+dfsg1-1
5.8.3+dfsg1-1
wordpress
Debian:13
 before 5.8.3+dfsg1-1
5.8.3+dfsg1-1
wordpress
Debian:14
 before 5.8.3+dfsg1-1
5.8.3+dfsg1-1
wordpress
Debian:9
From an advisory covering 4 CVEs
 before 4.7.22+dfsg-0+deb9u1, plus listed versions
4.7.18+dfsg-1+deb9u14.7.19+dfsg-1+deb9u14.7.20+dfsg-1+deb9u14.7.21+dfsg-0+deb9u14.7.5+dfsg-2
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4.7.5+dfsg-2+deb9u14.7.5+dfsg-2+deb9u1~bpo8+14.7.5+dfsg-2+deb9u24.7.5+dfsg-2+deb9u2~bpo8+14.7.5+dfsg-2+deb9u34.7.5+dfsg-2+deb9u44.7.5+dfsg-2+deb9u54.7.5+dfsg-2+deb9u6
4.7.22+dfsg-0+deb9u1
wordpress
Debian:10
From an advisory covering 4 CVEs
 before 5.0.15+dfsg1-0+deb10u1, plus listed versions
5.0.10+dfsg1-0+deb10u15.0.11+dfsg1-0+deb10u15.0.12+dfsg1-0+deb10u15.0.14+dfsg1-0+deb10u15.0.4+dfsg1-15.0.4+dfsg1-1+deb10u15.0.4+dfsg1-1+deb10u2
5.0.15+dfsg1-0+deb10u1
wordpress
Debian:11
From an advisory covering 4 CVEs
 before 5.7.5+dfsg1-0+deb11u1, plus listed versions
5.7.1+dfsg1-25.7.3+dfsg1-0+deb11u1
5.7.5+dfsg1-0+deb11u1
wordpress
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.3+dfsg-14.3.1+dfsg-14.4+dfsg-14.4.1+dfsg-14.4.2+dfsg-14.4.2+dfsg-1ubuntu1
 None known
wordpress
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.8.2+dfsg-24.8.3+dfsg-14.9.1+dfsg-14.9.2+dfsg-14.9.4+dfsg-14.9.5+dfsg1-1
 None known
wordpress
Ubuntu:20.04:LTS
 All versions, plus listed versions
5.2.2+dfsg1-15.2.4+dfsg1-15.3.2+dfsg1-15.3.2+dfsg1-1ubuntu1
 None known

History

History
RecordedChangedSources
affected, factsOSV
first indexedCVE List, EUVD, NVD, OSV

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

In short

CVE-2022-21663 is a medium vulnerability (CVSS 6.6) in Wordpress, published January 6, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.82%, the 90th percentile. Fixed in wordpress 5.8.3.

References

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