CVE-2020-28036 in the critical feed json
wp-includes/class-wp-xmlrpc-server.php in WordPress before 5.5.2 allows attackers to gain privileges by using XML-RPC to comment on a post.
published 2020-10-31 6 y ago modified 2026-09-08 2 mo ago also BIT-wordpress-2020-28036 , BIT-wordpress-multisite-2020-28036 , EUVD-2020-20527
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.2%
- EPSS 5.2% chance of exploitation in 30 days, percentile 92%
- public exploits
- 0
- none known
Summary
wp-includes/class-wp-xmlrpc-server.php in WordPress before 5.5.2 allows attackers to gain privileges by using XML-RPC to comment on a post.
Patch / fix
- bitnami wordpress 5.5.2
- bitnami wordpress-multisite 5.5.2
- wordpress wordpress 5.5.2
- wordpress Debian 14, Debian 13, Debian 12 5.5.3+dfsg1-1
debian advisories DEBIAN-CVE-2020-28036
- wordpress Arch Linux 5.5.3-1
arch linux advisories AVG-1257
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2020-28036 updated cvss 9.8
wordpress: privilege escalation by using XML-RPC to comment on a post
-
Red Hat All currently supported Red Hat productsnot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
5.22% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | wordpress | <5.5.2 |
5.5.2 |
| bitnami | wordpress-multisite | <5.5.2 |
5.5.2 |
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
-
github.com
/WordPress/wordpress-develop/commit/c9e6b98968025b1629015998d12c3102165a7d32
patch, third-party-advisory, advisory
-
debian.org
/security/2020/dsa-4784
vendor-advisory, third-party-advisory, advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/VAVVYJKA2I6CRQUINECDPBGWMQDEG244/
vendor-advisory, web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/VUXVUAKL2HL4QYJEPHBNVQQWRMFMII2Y/
vendor-advisory, web
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/CHHVNK2WYAM3ZTCXTFSEIT56IKLVJHU3/
vendor-advisory, web
-
wordpress.org
/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/
release-notes, vendor-advisory, advisory
-
wpscan.com
/vulnerability/10449
third-party-advisory, advisory
-
lists.debian.org
/debian-lts-announce/2020/11/msg00004.html
mailing-list, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-28036
web
Sources
- CVE List CVE-2020-28036
- NVD CVE-2020-28036
- OSV BIT-wordpress-2020-28036
- OSV BIT-wordpress-multisite-2020-28036
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.