CVE-2020-25827 json
OATHAuth extension in MediaWiki is not implementing rate limit
published 2020-09-27 6 y ago modified 2026-06-17 4 mo ago also BIT-mediawiki-2020-25827 , EUVD-2022-5220 , GHSA-rqvj-fc2x-99q6
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
An issue was discovered in the OATHAuth extension in MediaWiki before 1.31.10 and 1.32.x through 1.34.x before 1.34.4. For Wikis using OATHAuth on a farm/cluster (such as via CentralAuth), rate limiting of OATH tokens is only done on a single site level. Thus, multiple requests can be made across many wikis/sites concurrently.
Patch / fix
- packagist mediawiki/core 1.31.9, 1.34.3
- bitnami mediawiki 1.31.10, 1.34.4
- mediawiki mediawiki 1.31.10, 1.34.4
- mediawiki Debian 14, Debian 13, Debian 12 1:1.35.0-1
debian advisories DEBIAN-CVE-2020-25827
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-2020-25827 updated cvss 7.5
mediawiki: using OATHAuth on a farm/cluster (such as via CentralAuth), rate limiting of OATH tokens is only done on a single site level
-
Red Hat OpenShift Container Platform 3.11 mediawiki Red Hat OpenShift Container Platform 4 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
1.70% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- phabricator.wikimedia.org https://phabricator.wikimedia.org/T251661 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | mediawiki/core | >=1.31.0, <1.31.9 >=1.32.0, <1.34.3 |
1.31.9 1.34.3 |
| bitnami | mediawiki | <1.31.10 >=1.32.0, <1.34.4 |
1.31.10 1.34.4 |
Classification
- Weakness
-
- CWE-307 Improper Restriction of Excessive Authentication Attempts
References
-
phabricator.wikimedia.org
/T251661
web, exploit, vendor-advisory
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/
vendor-advisory, web
-
lists.wikimedia.org
/pipermail/mediawiki-l/2020-September/048480.html
web, mailing-list, vendor-advisory
-
lists.wikimedia.org
/pipermail/mediawiki-l/2020-September/048488.html
web, mailing-list, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2020-25827
advisory, web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/mediawiki/core/CVE-2020-25827.yaml
web
-
github.com
/wikimedia/mediawiki
package
-
lists.fedoraproject.org
/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
web
-
lists.fedoraproject.org
/archives/list/package-announce@lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6
web
Sources
- CVE List CVE-2020-25827
- GitHub Advisory GHSA-rqvj-fc2x-99q6
- NVD CVE-2020-25827
- OSV BIT-mediawiki-2020-25827
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.