Vulnerability Details : CVE-2020-25739
An issue was discovered in the gon gem before gon-6.4.0 for Ruby. MultiJson does not honor the escape_mode parameter to escape fields as an XSS protection mechanism. To mitigate, json_dumper.rb in gon now does escaping for XSS by default without relying on MultiJson.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2020-25739
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:a:gon_project:gon:*:*:*:*:*:ruby:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-25739
0.15%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-25739
| 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-2020-25739
-
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-2020-25739
-
https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7
CVE-2020-25739: Enforce HTML entities escaping in gon output · gazay/gon@fe3c7b2 · GitHubPatch;Third Party Advisory
-
https://usn.ubuntu.com/4560-1/
USN-4560-1: Gon gem vulnerability | Ubuntu security notices | UbuntuThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2020/09/msg00018.html
[SECURITY] [DLA 2380-1] ruby-gon security updateMailing List;Third Party Advisory
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