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Vulnerability details: VCID-bbef-akjp-a3gp
Vulnerability ID VCID-bbef-akjp-a3gp
Aliases CVE-2019-12473
GHSA-33xw-x3pr-rvqj
Summary Wikimedia Potential DOS due to slow WatchedItemStore::countVisitingWatchersMultiple Wikimedia MediaWiki 1.27.0 through 1.32.1 might allow DoS. Passing invalid titles to the API could cause a DoS by querying the entire watchlist table. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
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
epss 0.0046 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.0046 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
epss 0.00469 https://api.first.org/data/v1/epss?cve=CVE-2019-12473
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-33xw-x3pr-rvqj
cvssv3.1 7.5 https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2019-12473.yaml
generic_textual HIGH https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2019-12473.yaml
cvssv3.1 7.5 https://github.com/wikimedia/mediawiki
generic_textual HIGH https://github.com/wikimedia/mediawiki
cvssv3.1 7.5 https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
generic_textual HIGH https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2019-12473
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2019-12473
cvssv3.1 7.5 https://phabricator.wikimedia.org/T204729
generic_textual HIGH https://phabricator.wikimedia.org/T204729
cvssv3.1 7.5 https://seclists.org/bugtraq/2019/Jun/12
generic_textual HIGH https://seclists.org/bugtraq/2019/Jun/12
cvssv3.1 7.5 https://www.debian.org/security/2019/dsa-4460
generic_textual HIGH https://www.debian.org/security/2019/dsa-4460
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2019-12473
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11358
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12466
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12467
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12468
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12469
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12470
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12471
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12472
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12473
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12474
https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2019-12473.yaml
https://github.com/wikimedia/mediawiki
https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://nvd.nist.gov/vuln/detail/CVE-2019-12473
https://phabricator.wikimedia.org/T204729
https://seclists.org/bugtraq/2019/Jun/12
https://www.debian.org/security/2019/dsa-4460
GHSA-33xw-x3pr-rvqj https://github.com/advisories/GHSA-33xw-x3pr-rvqj
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2019-12473.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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-12473
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://phabricator.wikimedia.org/T204729
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://seclists.org/bugtraq/2019/Jun/12
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.debian.org/security/2019/dsa-4460
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 0.64193
EPSS Score 0.0046
Published At April 26, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:08:49.118589+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-33xw-x3pr-rvqj/GHSA-33xw-x3pr-rvqj.json 38.0.0