CVE-2020-25739
MEDIUM
6.1
CVSS Score
Published: September 23, 2020 at 01:53 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
3 products affected across 3 vendorsDebian LinuxUbuntu LinuxGon
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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Ubuntu Linux· Canonicalrubygems
95%Debian Linux· Debiandrupal
95%Gon· Gon Projectrubygems
95%v < 6.4.0
Affected range stops below 6.4.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/gazay/gon/commit/fe3c7b2191a992386dc9edd37de5447a4e809bc7Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/09/msg00018.htmlVendor Advisoryx_refsource_UBUNTUThird Party Advisory
Source: [email protected]
https://usn.ubuntu.com/4560-1/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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