CVE-2018-17876 Coaster CMS Stored Cross-site Scripting vulnerability

MediumCVSS 6.1 EPSS 1.00% Public exploit

Published: 2018-10-04 22:00
Updated: 2026-06-17 04:46
Exploit status: Public exploit available

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Description

A Stored XSS vulnerability has been discovered in the v5.5.0 version of the Coaster CMS product.

Affected products

Product	Affected versions	Fixed in
web-feet/coastercms(Packagist)	= 5.5.0	No fix listed
web-feet coaster cms	= 5.5.0	No fix listed

References

nvd.nist.gov third-party-advisory vendor-advisory
github.com product
packetstormsecurity.com exploit third-party-advisory vdb-entry
github.com

CVSS v3.0

6.1 Medium

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: Low
Integrity: Low
Availability: None

All scores (4)

v3.0 6.1 · nvd@nist.gov
v3.0 6.1 · osv:ghsa
v3.0 6.1 · github
v2.0 4.3 · nvd@nist.gov

Weakness & likelihood

EPSS (exploitation probability, 30 days): 1.00% (percentile 63.2)
CWE: CWE-79 Improper Neutralization of Input During Web Page Generation

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

Exploit implementation: packetstormsecurity.com/files/149647/Coaster-CMS-5.5.0-Cross-Site-Scripting.html Exploit · Packet Storm · 2026-11-11