Vulnerability Details : CVE-2020-35479
MediaWiki before 1.35.1 allows XSS via BlockLogFormatter.php. Language::translateBlockExpiry itself does not escape in all code paths. For example, the return of Language::userTimeAndDate is is always unsafe for HTML in a month value. This affects MediaWiki 1.12.0 and later.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2020-35479
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-35479
0.20%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 57 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-35479
| 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-2020-35479
-
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-2020-35479
-
https://phabricator.wikimedia.org/T268938
⚓ T268938 BlockLogFormatter can output raw html (CVE-2020-35478, CVE-2020-35479)Exploit;Vendor Advisory
-
https://www.debian.org/security/2020/dsa-4816
Debian -- Security Information -- DSA-4816-1 mediawikiThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2020/12/msg00034.html
[SECURITY] [DLA 2504-1] mediawiki security updateMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STT5Z4A3BCXVH3WIPICWU2FP4IPIMUPC/
[SECURITY] Fedora 33 Update: mediawiki-1.35.1-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html
[MediaWiki-announce] Security and maintenance release: 1.31.11 / 1.35.1Mailing List;Release Notes;Vendor Advisory
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