CVE-2021-45038
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37...
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
CVE-2021-45038- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
CVE-2021-45038- Updated
- 2026-11-02
EUVDEUVD-2021-31835 No score
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
EUVD-2021-31835- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8rcg-5g7w-gw95
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37...
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
GHSA-8rcg-5g7w-gw95- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
OSV
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
CVE-2021-45038- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-45038
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
DEBIAN-CVE-2021-45038- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-45038
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
UBUNTU-CVE-2021-45038- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVBIT-mediawiki-2021-45038 No score
An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
- Record
BIT-mediawiki-2021-45038- Updated
- 2026-11-02
OSVMGASA-2021-0568 No score
Updated mediawiki packages fix security vulnerabilities
Updated mediawiki packages fix security vulnerabilities:
== Security fixes ==
- (T292763. CVE-2021-44854) REST API incorrectly publicly caches autocomplete search results from private wikis.
- (T271037, CVE-2021-44856) Title blocked in AbuseFilter can be created via Special:ChangeContentModel.
- (T297322, CVE-2021-44857) Unauthorized users can use action=mcrundo to replace the content of arbitrary pages.
- (T297322, CVE-2021-44858) Unauthorized users can view contents of private wikis using various actions.
- (T297574, CVE-2021-45038) Unauthorized users can access private wiki contents using rollback action
=== Extension security fixes ===
- (T293589, CVE-2021-44855) Blind Stored XSS in VisualEditor media dialog.
- (T294686) Special:Nuke doesn't actually delete pages.
- Record
MGASA-2021-0568- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mediawikiBitnami |
before 1.35.5, 1.36.0 up to 1.36.3, 1.37.0 up to 1.37.1 | 1.35.51.36.31.37.1 |
mediawikiDebian:12 |
before 1:1.35.5-1 | 1:1.35.5-1 |
mediawikiDebian:13 |
before 1:1.35.5-1 | 1:1.35.5-1 |
mediawikiDebian:14 |
before 1:1.35.5-1 | 1:1.35.5-1 |
mediawikiDebian:11 From an advisory covering 3 CVEs |
before 1:1.35.4-1+deb11u2, plus listed versions 1:1.35.2-11:1.35.3-11:1.35.4-11:1.35.4-1~deb11u1 |
1:1.35.4-1+deb11u2 |
mediawikiMageia:8 From an advisory covering 6 CVEs |
before 1.35.5-1.mga8 | 1.35.5-1.mga8 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45038 is a medium vulnerability (CVSS 5.3) in Mediawiki, published December 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.40%, the 72nd percentile. Fixed in mediawiki 1.35.5.
References
phabricator.wikimedia.org/T297574
mediawiki.org/wiki/2021-12_security_release/FAQ
security.gentoo.org/glsa/202305-24
nvd.nist.gov/vuln/detail/CVE-2021-45038
github.com/advisories/GHSA-8rcg-5g7w-gw95
security-tracker.debian.org/tracker/CVE-2021-45038
Show 6 moreShow less
advisories.mageia.org/MGASA-2021-0568.html
bugs.mageia.org/show_bug.cgi?id=29772
lists.wikimedia.org/hyperkitty/list/[email protected]/thread/QEN3EK4JXAVJMJ5GF3GYOAKNJPEKFQYA
ubuntu.com/security/CVE-2021-45038
cve.org/CVERecord?id=CVE-2021-45038