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Vulnerability details: VCID-bcea-x4a1-b7d9
Vulnerability ID VCID-bcea-x4a1-b7d9
Aliases CVE-2018-0503
GHSA-mhfv-9h99-jwg7
Summary Mediawiki Improper Privilege Management Mediawiki 1.31 before 1.31.1, 1.30.1, 1.29.3 and 1.27.5 contains a flaw where contrary to the documentation, $wgRateLimits entry for 'user' overrides that for 'newbie'.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-269 Improper Privilege Management
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
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
cvssv3.1 4.3 https://access.redhat.com/errata/RHSA-2019:3142
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:3142
cvssv3.1 4.3 https://access.redhat.com/errata/RHSA-2019:3238
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:3238
cvssv3.1 4.3 https://access.redhat.com/errata/RHSA-2019:3813
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:3813
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0503.json
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
epss 0.00529 https://api.first.org/data/v1/epss?cve=CVE-2018-0503
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-mhfv-9h99-jwg7
cvssv3.1 4.3 https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2018-0503.yaml
generic_textual MODERATE https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2018-0503.yaml
cvssv3.1 4.3 https://github.com/wikimedia/mediawiki
generic_textual MODERATE https://github.com/wikimedia/mediawiki
cvssv3.1 4.3 https://lists.wikimedia.org/pipermail/wikitech-l/2018-September/090849.html
generic_textual MODERATE https://lists.wikimedia.org/pipermail/wikitech-l/2018-September/090849.html
cvssv2 4.0 https://nvd.nist.gov/vuln/detail/CVE-2018-0503
cvssv3 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-0503
cvssv3.1 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-0503
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2018-0503
cvssv3.1 4.3 https://phabricator.wikimedia.org/T169545
generic_textual MODERATE https://phabricator.wikimedia.org/T169545
archlinux Medium https://security.archlinux.org/AVG-765
cvssv3.1 4.3 https://www.debian.org/security/2018/dsa-4301
generic_textual MODERATE https://www.debian.org/security/2018/dsa-4301
cvssv3.1 4.3 http://www.securitytracker.com/id/1041695
generic_textual MODERATE http://www.securitytracker.com/id/1041695
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2019:3142
https://access.redhat.com/errata/RHSA-2019:3238
https://access.redhat.com/errata/RHSA-2019:3813
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0503.json
https://api.first.org/data/v1/epss?cve=CVE-2018-0503
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0503
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0504
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0505
https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2018-0503.yaml
https://github.com/wikimedia/mediawiki
https://lists.wikimedia.org/pipermail/wikitech-l/2018-September/090849.html
https://nvd.nist.gov/vuln/detail/CVE-2018-0503
https://phabricator.wikimedia.org/T169545
https://www.debian.org/security/2018/dsa-4301
http://www.securitytracker.com/id/1041695
1634161 https://bugzilla.redhat.com/show_bug.cgi?id=1634161
ASA-201809-5 https://security.archlinux.org/ASA-201809-5
AVG-765 https://security.archlinux.org/AVG-765
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:a:mediawiki:mediawiki:1.27.5:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mediawiki:mediawiki:1.27.5:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.29.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mediawiki:mediawiki:1.29.3:*:*:*:*:*:*:*
cpe:2.3:a:mediawiki:mediawiki:1.30.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mediawiki:mediawiki:1.30.1:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
GHSA-mhfv-9h99-jwg7 https://github.com/advisories/GHSA-mhfv-9h99-jwg7
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2019:3142
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:L/UI:N/S:U/C:N/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2019:3238
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:L/UI:N/S:U/C:N/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2019:3813
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:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0503.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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://github.com/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2018-0503.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:L/UI:N/S:U/C:N/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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://lists.wikimedia.org/pipermail/wikitech-l/2018-September/090849.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:L/Au:S/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-0503
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:3.0/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-2018-0503
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:L/UI:N/S:U/C:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-0503
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:L/UI:N/S:U/C:N/I:L/A:N Found at https://phabricator.wikimedia.org/T169545
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:L/UI:N/S:U/C:N/I:L/A:N Found at https://www.debian.org/security/2018/dsa-4301
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:L/UI:N/S:U/C:N/I:L/A:N Found at http://www.securitytracker.com/id/1041695
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 0.65362
EPSS Score 0.00509
Published At Sept. 9, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:16:07.807216+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-mhfv-9h99-jwg7/GHSA-mhfv-9h99-jwg7.json 37.0.0