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Vulnerability details: VCID-38ac-xq25-aaaq

Essentials
Severities (97)
References (24)
Severity details (11)
Exploits (0)
EPSS
History (0)

Vulnerability ID	VCID-38ac-xq25-aaaq
Aliases	CVE-2021-30157
Summary	An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. On ChangesList special pages such as Special:RecentChanges and Special:Watchlist, some of the rcfilters-filter-* label messages are output in HTML unescaped, leading to XSS.
Status	Published
Exploitability	0.5
Weighted Severity	6.2
Risk	3.1
Affected and Fixed Packages	Package Details

Weaknesses (1)

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

System	Score	Found at
cvssv3	6.1	https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30157.json
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00530	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00553	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00553	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00553	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.00553	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.01229	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
epss	0.02531	https://api.first.org/data/v1/epss?cve=CVE-2021-30157
rhbs	medium	https://bugzilla.redhat.com/show_bug.cgi?id=1946692
generic_textual	Medium	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20270
generic_textual	Medium	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27291
cvssv2	4.3	https://nvd.nist.gov/vuln/detail/CVE-2021-30157
cvssv3	6.1	https://nvd.nist.gov/vuln/detail/CVE-2021-30157
cvssv3.1	6.1	https://nvd.nist.gov/vuln/detail/CVE-2021-30157
archlinux	Medium	https://security.archlinux.org/AVG-1775
cvssv3.1	6.1	https://security.gentoo.org/glsa/202107-40
generic_textual	MODERATE	https://security.gentoo.org/glsa/202107-40
cvssv3.1	7.5	https://www.debian.org/security/2021/dsa-4889
generic_textual	HIGH	https://www.debian.org/security/2021/dsa-4889

Reference id	Reference type	URL
		https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30157.json
		https://api.first.org/data/v1/epss?cve=CVE-2021-30157
		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.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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE/
		https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT/
		https://phabricator.wikimedia.org/T278058
		https://security.gentoo.org/glsa/202107-40
		https://www.debian.org/security/2021/dsa-4889
1946692		https://bugzilla.redhat.com/show_bug.cgi?id=1946692
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: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-2021-30157		https://nvd.nist.gov/vuln/detail/CVE-2021-30157

No exploits are available.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-30157.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

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:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30157

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

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

partial

complete

none

partial

complete

none

partial

complete

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30157

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

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: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-30157

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

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: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://security.gentoo.org/glsa/202107-40

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

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: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.debian.org/security/2021/dsa-4889

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

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	0.77517
EPSS Score	0.00530
Published At	Nov. 1, 2024, midnight

Date	Actor	Action	Source	VulnerableCode Version
There are no relevant records.