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CVE-2018-17876

21
FAUCET Score

CVE-2018-17876 describes a Stored Cross-Site Scripting (XSS) vulnerability found in Coaster CMS version 5.5.0. This medium-severity flaw (CVSS 6.1) allows an unauthenticated attacker to inject malicious scripts into the application, which could lead to information disclosure or defacement when viewed by other users. While there is no evidence of active exploitation, public exploit code, or significant community discussion, organizations using the affected Coaster CMS version should apply available patches to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
5.5.0CPE matchmatch criteria
cpe:2.3:a:web-feet:coaster_cms:5.5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 71st percentile among its peer group of 26,208 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

Vendor Advisories (1)

composerGHSA-77cq-wgpf-g449medium

Coaster CMS Stored Cross-site Scripting vulnerability

May 14, 2022

References

packetstormsecurity.com / files/149647/Coaster-CMS-5.5.0-Cross-Site-Scripting.html
ExploitThird Party AdvisoryVDB Entry