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CVE-2018-1000842

21
FAUCET Score

CVE-2018-1000842 describes a Cross-Site Scripting (XSS) vulnerability in multiple versions of FatFreeCRM, specifically <=0.14.1, >=0.15.0 <=0.15.1, >=0.16.0 <=0.16.3, >=0.17.0 <=0.17.2, and ==0.18.0. This flaw allows for JavaScript execution in end-user browsers when they view specially crafted content. Rated as Medium severity (CVSS 6.1), it requires user interaction (UI:R) and could lead to limited confidentiality and integrity impacts (C:L/I:L). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.14.1CPE matchmatch criteria
cpe:2.3:a:fatfreecrm:fatfreecrm:*:*:*:*:*:ruby:*:*
>= 0.15.0, <= 0.15.1CPE matchmatch criteria
cpe:2.3:a:fatfreecrm:fatfreecrm:*:*:*:*:*:ruby:*:*
>= 0.16.0, <= 0.16.3CPE matchmatch criteria
cpe:2.3:a:fatfreecrm:fatfreecrm:*:*:*:*:*:ruby:*:*
>= 0.17.0, <= 0.17.2CPE matchmatch criteria
cpe:2.3:a:fatfreecrm:fatfreecrm:*:*:*:*:*:ruby:*:*
0.18.0CPE matchmatch criteria
cpe:2.3:a:fatfreecrm:fatfreecrm:0.18.0:*:*:*:*:ruby:*:*

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
1.67%
Probability of exploitation in next 30 days
EPSS Percentile
74.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0167 is in the 86th percentile among its peer group of 26,234 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

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: fat_free_crmFixed in: 0.14.2
rubygemspatch availablevia ghsa
Product: fat_free_crmFixed in: 0.15.2
rubygemspatch availablevia ghsa
Product: fat_free_crmFixed in: 0.16.4
rubygemspatch availablevia ghsa
Product: fat_free_crmFixed in: 0.17.3
rubygemspatch availablevia ghsa
Product: fat_free_crmFixed in: 0.18.1

Vendor Advisories (1)

rubygemsGHSA-j5rj-g695-342rmedium

Fat Free CRM vulnerable to Cross-site Scripting

Dec 20, 2018

References

github.com / asteinhauser/fat_free_crm/commit/306f940b26ccf3f406665f07bece1229a7a5dcfa
Patch
github.com / asteinhauser/fat_free_crm/issues/1
Third Party Advisory
github.com / fatfreecrm/fat_free_crm/wiki/XSS-Vulnerability-%282018-10-27%29
PatchThird Party Advisory
groups.google.com / forum