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Vulnerability details: VCID-e1ud-yfqb-4kca
Vulnerability ID VCID-e1ud-yfqb-4kca
Aliases CVE-2012-4421
Summary The create_post function in wp-includes/class-wp-atom-server.php in WordPress before 3.4.2 does not perform a capability check, which allows remote authenticated users to bypass intended access restrictions and publish new posts by leveraging the Contributor role and using the Atom Publishing Protocol (aka AtomPub) feature.
Status Published
Exploitability 0.5
Weighted Severity 3.6
Risk 1.8
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-264 Permissions, Privileges, and Access Controls
System Score Found at
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
epss 0.00204 https://api.first.org/data/v1/epss?cve=CVE-2012-4421
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2012-4421
Reference id Reference type URL
http://codex.wordpress.org/Version_3.4.2
http://core.trac.wordpress.org/changeset?old_path=%2Ftags%2F3.4.1&old=21780&new_path=%2Ftags%2F3.4.2&new=21780#file2
http://openwall.com/lists/oss-security/2012/09/13/4
https://api.first.org/data/v1/epss?cve=CVE-2012-4421
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4421
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cpe:2.3:a:wordpress:wordpress:3.3.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wordpress:wordpress:3.3.1:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:3.3.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wordpress:wordpress:3.3.2:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:3.3.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wordpress:wordpress:3.3.3:*:*:*:*:*:*:*
cpe:2.3:a:wordpress:wordpress:3.4.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wordpress:wordpress:3.4.0:*:*:*:*:*:*:*
CVE-2012-4421 https://nvd.nist.gov/vuln/detail/CVE-2012-4421
No exploits are available.
Vector: AV:N/AC:L/Au:S/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2012-4421
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Exploit Prediction Scoring System (EPSS)
Percentile 0.42529
EPSS Score 0.00204
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T16:31:04.622825+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.0.0