CVE-2023-3550
CVSS v3
7.3
HIGH
EPSS Score
1.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
Technical details
- Published
- 2023-09-25
Frequently asked questions
What is CVE-2023-3550?
Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
Is CVE-2023-3550 actively exploited?
Active exploitation of CVE-2023-3550 has not been confirmed. Its EPSS score was 1.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-3550?
CVE-2023-3550 has a CVSS v3 base score of 7.3 (HIGH severity).
Is CVE-2023-3550 affecting your environment?
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