Improper input validation in Miraheze Globalnewfiles
CVE-2021-39186
GlobalNewFiles is a MediaWiki extension maintained by Miraheze. Prior to commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d, the username column of the GlobalNewFiles special page is vulnerable to a stored XSS. Commit number cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d contains a patch. As a workaround, one may disallow <,> (or other characters required to insert html/js) from being used in account names so an XSS is not possible.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.010 (61.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Miraheze Globalnewfiles — versions < cee254e1b158cdb0ddbea716b1d3edc31fa4fb5d
Weakness classification (CWE)
References
- github.com/miraheze/GlobalNewFiles/security/advisories/GHSA-57p5-hqjq-h7vg (Third Party Advisory)
- github.com/miraheze/GlobalNewFiles/commit/cee254e1b158cdb0ddbea716b1d3edc31fa4f… (Patch, Third Party Advisory)
- phabricator.miraheze.org/T7935 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39186?
- CVE-2021-39186 is a medium-severity vulnerability in Miraheze Globalnewfiles, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2021-09-01.
- How severe is CVE-2021-39186?
- Medium severity. CVSS v3 base score is 4.3 out of 10.