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Vulnerability details: VCID-sh4s-g6hc-vbhf
Vulnerability ID VCID-sh4s-g6hc-vbhf
Aliases CVE-2021-30159
Summary mediawiki: users can bypass intended restrictions on deleting pages in certain "fast double move" situations
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-863 Incorrect Authorization
System Score Found at
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30159.json
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
epss 0.00754 https://api.first.org/data/v1/epss?cve=CVE-2021-30159
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2021-30159
cvssv3.1 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-30159
archlinux Medium https://security.archlinux.org/AVG-1775
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30159.json
https://api.first.org/data/v1/epss?cve=CVE-2021-30159
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20270
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27291
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30152
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30154
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30155
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30157
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30158
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30159
https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html
https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT/
https://phabricator.wikimedia.org/T272386
https://security.gentoo.org/glsa/202107-40
https://www.debian.org/security/2021/dsa-4889
1948638 https://bugzilla.redhat.com/show_bug.cgi?id=1948638
AVG-1775 https://security.archlinux.org/AVG-1775
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-30159 https://nvd.nist.gov/vuln/detail/CVE-2021-30159
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30159.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:S/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30159
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
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30159
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.72264
EPSS Score 0.00754
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T10:15:34.312148+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30159.json 37.0.0