Vulnerability Details : CVE-2020-27620
The Cosmos Skin for MediaWiki through 1.35.0 has stored XSS because MediaWiki messages were not being properly escaped. This is related to wfMessage and Html::rawElement, as demonstrated by CosmosSocialProfile::getUserGroups.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2020-27620
- cpe:2.3:a:mediawiki:skin\:cosmos:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27620
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 50 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27620
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
2.8
|
2.7
|
NIST |
CWE ids for CVE-2020-27620
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-27620
-
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634749
SECURITY [XSS-Injection]: Properly escape i18n message calls that had no output mode (Id2641eda) · Gerrit Code ReviewVendor Advisory
-
https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634751
SECURITY [XSS-Injection]: Properly escape i18n message calls that had no output mode (I73847198) · Gerrit Code ReviewVendor Advisory
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https://gerrit.wikimedia.org/r/c/mediawiki/skins/Cosmos/+/634752
SECURITY [XSS-Injection]: Properly escape i18n message calls that had no output mode (I4e3152e9) · Gerrit Code ReviewVendor Advisory
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https://phabricator.wikimedia.org/T265440
⚓ T265440 Cosmos skin: Mix used of wfMessage() calls with no output mode and Html::rawElementVendor Advisory
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