CVE-2020-10534 json
In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked…
published 2020-03-12 6 y ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2020-10534 , EUVD-2020-2987
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
In the GlobalBlocking extension before 2020-03-10 for MediaWiki through 1.34.0, an issue related to IP range evaluation resulted in blocked users re-gaining escalated privileges. This is related to the case in which an IP address is contained in two ranges, one of which is locally disabled.
Patch / fix
- bitnami mediawiki 1.34.1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2020-10534 updated cvss 8.1
mediawiki: IP range evaluation issue allows blocked users regain escalated privileges
-
Red Hat OpenShift Container Platform 3.11 openshift3/mediawiki Red Hat OpenShift Container Platform 4 openshift4/mediawikinot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
1.21% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | mediawiki | <1.34.1 |
1.34.1 |
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
gerrit.wikimedia.org
/r/#/q/I9cc5fb2c08c78bbd797a5fc6d89f4577c8cc118b
patch, vendor-advisory, web
-
phabricator.wikimedia.org
/T229731
vendor-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2020-10534
web
Sources
- CVE List CVE-2020-10534
- NVD CVE-2020-10534
- OSV BIT-mediawiki-2020-10534
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.