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CVE-2020-5631

21
FAUCET Score

CVE-2020-5631 describes a stored cross-site scripting (XSS) vulnerability affecting CMONOS.JP version 2.0.20191009 and earlier. This allows remote attackers to inject arbitrary scripts into web pages, potentially leading to session hijacking or defacement. With a CVSS score of 6.1 (Medium), exploitation requires user interaction (UI:R) but can be executed over the network (AV:N) with low attack complexity (AC:L), impacting confidentiality and integrity (C:L/I:L). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.20200916CPE matchmatch criteria
cpe:2.3:a:cmonos:cmonos:2.0.20200916:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.03%
Probability of exploitation in next 30 days
EPSS Percentile
60.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0103 is in the 73rd percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cmonos.jp / download/history.html
Vendor Advisory
cmonos.jp / download/index.shtml
Vendor Advisory
jvn.jp / en/vu/JVNVU93741515/index.html
Third Party Advisory