Vulnerability Details : CVE-2021-30458
An issue was discovered in Wikimedia Parsoid before 0.11.1 and 0.12.x before 0.12.2. An attacker can send crafted wikitext that Utils/WTUtils.php will transform by using a <meta> tag, bypassing sanitization steps, and potentially allowing for XSS.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2021-30458
- cpe:2.3:a:wikimedia:parsoid:*:*:*:*:*:node.js:*:*
- cpe:2.3:a:wikimedia:parsoid:*:*:*:*:*:node.js:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-30458
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 36 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-30458
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-2021-30458
-
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-2021-30458
-
https://www.mediawiki.org/wiki/Parsoid
Parsoid - MediaWikiVendor Advisory
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https://phabricator.wikimedia.org/T279451
⚓ T279451 CVE-2021-30458: Parsoid comment fostering allows for inserting mostly arbitrary <meta> tagsIssue Tracking;Vendor Advisory
-
https://security.gentoo.org/glsa/202107-40
MediaWiki: Multiple vulnerabilities (GLSA 202107-40) — Gentoo securityThird Party Advisory
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