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CVE-2018-0503

18
FAUCET Score

CVE-2018-0503 describes a flaw in MediaWiki versions 1.31 before 1.31.1, 1.30.1, 1.29.3, and 1.27.5, where the rate limit configuration for 'user' incorrectly overrides that for 'newbie'. This vulnerability has a CVSS score of 4.3 (Medium), indicating a low attack complexity and requiring low privileges to achieve a low integrity impact, primarily affecting the integrity of the system. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.31.0, < 1.31.1CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
1.27.5CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.27.5:*:*:*:*:*:*:*
1.29.3CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.29.3:*:*:*:*:*:*:*
1.30.1CPE matchmatch criteria
cpe:2.3:a:mediawiki:mediawiki:1.30.1:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 86th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.27.5
composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.29.3
composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.30.1
composerpatch availablevia ghsa
Product: mediawiki/coreFixed in: 1.31.1
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.10Fixed in: mediawiki-0:1.27.7-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: mediawiki-0:1.27.7-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.9Fixed in: mediawiki123-0:1.23.17-1.el7
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: mediawiki

Vendor Advisories (2)

composerGHSA-mhfv-9h99-jwg7medium

Mediawiki Improper Privilege Management

May 13, 2022
redhatCVE-2018-0503Low

mediawiki: $wgRateLimits (rate limit / ping limiter) entry for 'user' overrides that for 'newbie'

Sep 24, 2018

References

access.redhat.com / errata/RHSA-2019:3142
access.redhat.com / errata/RHSA-2019:3238
access.redhat.com / errata/RHSA-2019:3813
lists.wikimedia.org / pipermail/wikitech-l/2018-September/090849.html
PatchVendor Advisory
phabricator.wikimedia.org / T169545
PatchThird Party Advisory
debian.org / security/2018/dsa-4301
Third Party Advisory
securitytracker.com / id/1041695
Third Party AdvisoryVDB Entry