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Vulnerability details: VCID-p8gc-bk7w-1khy
Vulnerability ID VCID-p8gc-bk7w-1khy
Aliases CVE-2020-25814
GHSA-4vr7-m8p8-434h
Summary MediaWiki Cross-site Scripting (XSS) vulnerability In MediaWiki before 1.31.9 and 1.32.x through 1.34.x before 1.34.3, XSS related to jQuery can occur. The attacker creates a message with [javascript:payload xss] and turns it into a jQuery object with mw.message().parse(). The expected result is that the jQuery object does not contain an <a> tag (or it does not have a href attribute, or it's empty, etc.). The actual result is that the object contains an <a href ="javascript... that executes when clicked.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-25814.json
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
epss 0.00465 https://api.first.org/data/v1/epss?cve=CVE-2020-25814
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-4vr7-m8p8-434h
cvssv3.1 6.1 https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25814.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25814.yaml
cvssv3.1 6.1 https://github.com/wikimedia/mediawiki
generic_textual MODERATE https://github.com/wikimedia/mediawiki
cvssv3.1 6.1 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
generic_textual MODERATE https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
cvssv3.1 6.1 https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
generic_textual MODERATE https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
cvssv3.1 6.1 https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
generic_textual MODERATE https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2020-25814
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2020-25814
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2020-25814
cvssv3.1 6.1 https://phabricator.wikimedia.org/T86738
generic_textual MODERATE https://phabricator.wikimedia.org/T86738
cvssv3.1 6.1 https://www.mediawiki.org/wiki/ResourceLoader/Core_modules#mediawiki.jqueryMsg
generic_textual MODERATE https://www.mediawiki.org/wiki/ResourceLoader/Core_modules#mediawiki.jqueryMsg
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-25814.json
https://api.first.org/data/v1/epss?cve=CVE-2020-25814
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15005
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-17367
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-17368
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25812
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25813
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25814
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25827
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25828
https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25814.yaml
https://github.com/wikimedia/mediawiki
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
https://nvd.nist.gov/vuln/detail/CVE-2020-25814
https://phabricator.wikimedia.org/T86738
https://www.mediawiki.org/wiki/ResourceLoader/Core_modules#mediawiki.jqueryMsg
1903774 https://bugzilla.redhat.com/show_bug.cgi?id=1903774
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:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
GHSA-4vr7-m8p8-434h https://github.com/advisories/GHSA-4vr7-m8p8-434h
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-2020-25814.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: 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/mediawiki/core/CVE-2020-25814.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
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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
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://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html
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://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html
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-2020-25814
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:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-25814
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/T86738
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/ResourceLoader/Core_modules#mediawiki.jqueryMsg
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 0.6336
EPSS Score 0.00465
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:13:32.680559+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-4vr7-m8p8-434h/GHSA-4vr7-m8p8-434h.json 37.0.0