CVE-2020-28032

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility...

9.8 CriticalPublic exploitFix available

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

15.7%Up 13.8 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: CVE-2020-28032
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-502
Updated: 2026-11-02

CVE List No score

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: CVE-2020-28032
Updated: 2026-11-02

EUVDEUVD-2020-20523 No score

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: EUVD-2020-20523
Updated: 2026-11-03

GitHub AdvisoriesGHSA-546f-q8mw-j4qj 9.8

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility...

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: GHSA-546f-q8mw-j4qj
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-502
Updated: 2026-11-02

OSV 9.8

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: CVE-2020-28032
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-28032 9.8

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: DEBIAN-CVE-2020-28032
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-28032 9.8

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: UBUNTU-CVE-2020-28032
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVBIT-wordpress-2020-28032 No score

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: BIT-wordpress-2020-28032
Updated: 2026-11-02

OSVBIT-wordpress-multisite-2020-28032 No score

WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php.

Record: BIT-wordpress-multisite-2020-28032
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`wordpress` Bitnami	before 5.5.2	5.5.2
`wordpress-multisite` Bitnami	before 5.5.2	5.5.2
`wordpress` Debian:12	before 5.5.3+dfsg1-1	5.5.3+dfsg1-1
`wordpress` Debian:13	before 5.5.3+dfsg1-1	5.5.3+dfsg1-1
`wordpress` Debian:14	before 5.5.3+dfsg1-1	5.5.3+dfsg1-1
`wordpress` Debian:9	before 4.7.19+dfsg-1+deb9u1, plus listed versions 4.7.18+dfsg-1+deb9u14.7.5+dfsg-24.7.5+dfsg-2+deb9u14.7.5+dfsg-2+deb9u1~bpo8+14.7.5+dfsg-2+deb9u2 Show 5 moreShow less 4.7.5+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	4.7.19+dfsg-1+deb9u1
`wordpress` Debian:10	before 5.0.11+dfsg1-0+deb10u1, plus listed versions 5.0.10+dfsg1-0+deb10u15.0.4+dfsg1-15.0.4+dfsg1-1+deb10u15.0.4+dfsg1-1+deb10u2	5.0.11+dfsg1-0+deb10u1
`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

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Affected packages
Package	Affected	Fixed
`wordpress` Ubuntu:22.04:LTS	All versions, plus listed versions 5.7.1+dfsg1-2ubuntu15.8.1+dfsg1-2ubuntu15.8.2+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu1.1	None known
`wordpress` Ubuntu:24.04:LTS	All versions, plus listed versions 6.2+dfsg1-1ubuntu16.4.3+dfsg1-1ubuntu1	None known
`wordpress` Ubuntu:25.10	All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu1	None known
`wordpress` Ubuntu:26.10	All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu2	None known
`wordpress` Ubuntu:26.04:LTS	All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu16.7.2+dfsg1-1.1ubuntu2	None known

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	nth347/CVE-2020-28032_PoC	2021-11-17

History

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

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

In short

CVE-2020-28032 is a critical vulnerability (CVSS 9.8) in Wordpress, published October 31, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 15.7%, the 96th percentile. Fixed in wordpress 5.5.2.

References

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