CVE-2020-29007

9.8 criticalEPSS 2.3%

Critical (9.8) in mediawiki score. EPSS 2.3% chance of exploitation in the next 30 days.

The Score extension through 0.3.0 for MediaWiki has a remote code execution vulnerability due to improper sandboxing of the GNU LilyPond executable. This allows any user with an ability to edit articles (potentially including unauthenticated anonymous users) to execute arbitrary Scheme or shell code by using crafted {{Image data to generate musical scores containing malicious code.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
CWE: CWE-94
Published: 2023-04-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mediawiki:score

References

https://github.com/seqred-s-a/cve-2020-29007
https://phabricator.wikimedia.org/T257062
https://seqred.pl/en/cve-2020-29007-remote-code-execution-in-mediawiki-score/
https://www.mediawiki.org/wiki/Extension:Score
https://www.mediawiki.org/wiki/Extension:Score/2021_security_advisory

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