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Vulnerability details: VCID-qmez-1c1f-kye2
Vulnerability ID VCID-qmez-1c1f-kye2
Aliases CVE-2021-30458
GHSA-5pqx-77vf-85rw
Summary multiple issues
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
epss 0.00214 https://api.first.org/data/v1/epss?cve=CVE-2021-30458
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-5pqx-77vf-85rw
cvssv3.1 6.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/wikimedia/parsoid/CVE-2021-30458.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/wikimedia/parsoid/CVE-2021-30458.yaml
cvssv3.1 6.1 https://github.com/wikimedia/mediawiki-services-parsoid
generic_textual MODERATE https://github.com/wikimedia/mediawiki-services-parsoid
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2021-30458
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-30458
cvssv3.1 6.1 https://phabricator.wikimedia.org/T279451
generic_textual MODERATE https://phabricator.wikimedia.org/T279451
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 6.1 https://www.mediawiki.org/wiki/Parsoid
generic_textual MODERATE https://www.mediawiki.org/wiki/Parsoid
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-30458
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30458
https://github.com/FriendsOfPHP/security-advisories/blob/master/wikimedia/parsoid/CVE-2021-30458.yaml
https://github.com/wikimedia/mediawiki-services-parsoid
https://nvd.nist.gov/vuln/detail/CVE-2021-30458
https://phabricator.wikimedia.org/T279451
https://security.gentoo.org/glsa/202107-40
https://www.mediawiki.org/wiki/Parsoid
AVG-1775 https://security.archlinux.org/AVG-1775
GHSA-5pqx-77vf-85rw https://github.com/advisories/GHSA-5pqx-77vf-85rw
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://github.com/FriendsOfPHP/security-advisories/blob/master/wikimedia/parsoid/CVE-2021-30458.yaml
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://github.com/wikimedia/mediawiki-services-parsoid
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-2021-30458
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://phabricator.wikimedia.org/T279451
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
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.mediawiki.org/wiki/Parsoid
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 0.44127
EPSS Score 0.00214
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T11:54:27.964730+00:00 Arch Linux Importer Import https://security.archlinux.org/AVG-1775 36.1.3