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CVE-2019-12471

MediaWiki Cross-site Scripting (XSS)

6.1 MediumFix available

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

1.29%Up 0.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.1

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
CVE-2019-12471
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-79
Updated
2026-11-02
CVE List No score

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
CVE-2019-12471
Updated
2026-11-02
EUVDEUVD-2022-2043 No score

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
EUVD-2022-2043
Updated
2026-11-03
GitHub AdvisoriesGHSA-2rm7-xxx8-35jh 6.1

MediaWiki Cross-site Scripting (XSS)

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
GHSA-2rm7-xxx8-35jh
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 6.1

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
CVE-2019-12471
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2019-12471 6.1

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
DEBIAN-CVE-2019-12471
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVGHSA-2rm7-xxx8-35jh 6.1

MediaWiki Cross-site Scripting (XSS)

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
GHSA-2rm7-xxx8-35jh
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVUBUNTU-CVE-2019-12471 6.1

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Record
UBUNTU-CVE-2019-12471
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVMGASA-2019-0279 No score

Updated mediawiki packages fix security vulnerabilities

Updated mediawiki packages fix security vulnerabilities:

Potential XSS in jQuery (CVE-2019-11358).

An account can be logged out without using a token (CSRF) (CVE-2019-12466).

A spammer can use Special:ChangeEmail to send out spam with no rate limiting or ability to block them (CVE-2019-12467).

Directly POSTing to Special:ChangeEmail would allow for bypassing reauthentication, allowing for potential account takeover (CVE-2019-12468).

Exposed suppressed username or log in Special:EditTags (CVE-2019-12469).

Exposed suppressed log in RevisionDelete page (CVE-2019-12470).

Loading user JavaScript from a non-existent account allows anyone to create the account, and XSS the users' loading that script (CVE-2019-12471).

It is possible to bypass the limits on IP range blocks ($wgBlockCIDRLimit) by using the API (CVE-2019-12472).

Passing invalid titles to the API could cause a DoS by querying the entire watchlist table (CVE-2019-12473).

Privileged API responses that include whether a recent change has been patrolled may be cached publicly (CVE-2019-12474).

The mediawiki package has been updated to version 1.27.6 (Mageia 6) and 1.31.2 (Mageia 7), fixing these issues and other bugs. See the release announcements for more details.

Record
MGASA-2019-0279
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
mediawiki/core
Packagist
 1.27.0 up to 1.27.6
1.27.6
mediawiki/core
Packagist
 1.30.0 up to 1.30.2
1.30.2
mediawiki/core
Packagist
 1.31.0 up to 1.31.2
1.31.2
mediawiki
Debian:12
 before 1:1.31.2-1
1:1.31.2-1
mediawiki
Debian:13
 before 1:1.31.2-1
1:1.31.2-1
mediawiki
Debian:14
 before 1:1.31.2-1
1:1.31.2-1
mediawiki
Debian:9
From an advisory covering 10 CVEs
 before 1:1.27.7-1~deb9u1, plus listed versions
1:1.27.3-11:1.27.4-11:1.27.4-1~bpo8+11:1.27.4-1~deb9u11:1.27.4-21:1.27.4-31:1.27.5-1~deb9u11:1.27.6-1~deb9u1
1:1.27.7-1~deb9u1
mediawiki/core
Packagist
 1.27.0 up to 1.27.6, plus listed versions
1.27.11.27.21.27.31.27.41.27.5
1.27.6
mediawiki/core
Packagist
 1.30.0 up to 1.30.2, plus listed versions
1.30.1
1.30.2
mediawiki/core
Packagist
 1.31.0 up to 1.31.2, plus listed versions
1.31.1
1.31.2
mediawiki
Mageia:6
From an advisory covering 10 CVEs
 before 1.27.7-1.mga6
1.27.7-1.mga6
mediawiki
Mageia:7
From an advisory covering 10 CVEs
 before 1.31.3-1.mga7
1.31.3-1.mga7
mediawiki
Ubuntu:18.04:LTS
 All versions, plus listed versions
1:1.27.3-11:1.27.4-11:1.27.4-21:1.27.4-3
 None known

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-12471 is a medium vulnerability (CVSS 6.1) in Mediawiki, published June 12, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.29%, the 70th percentile. Fixed in mediawiki/core 1.27.6.

References

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