EUVD Vulnerability Catalog
EUVD-2026-114131
Severity: MEDIUM
Base Score: 5.3
CVSS Version: 4.0
Vulnerability Description
RT's automatic link creation for URLs in HTML ticket content does
not HTML-escape the URL it places in the link. A URL crafted to
break out of the link's address can add a script that runs when the
ticket history is displayed, with no further action by the viewer.
Anyone who can add HTML content to a ticket can plant it. That
includes an unauthenticated sender of HTML email to any queue that
grants CreateTicket or ReplyToTicket to Everyone, which is routine
for a queue that accepts mail from the public. The script runs in
the session of any user who views the ticket, and can act in RT
with that user's authority.
This issue was fixed in version 5.0.11 and 6.0.4
CVSS Vector Analysis
Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
▪
Attack Vector (AV): Network
▪
Attack Complexity (AC): Low
▪
Attack Requirements (AT): None
▪
Privileges Required (PR): None
▪
User Interaction (UI): Passive
▪
Vulnerability Confidentiality Impact (VC): Low
▪
Vulnerability Integrity Impact (VI): Low
▪
Vulnerability Availability Impact (VA): None
▪
Subsequent Confidentiality Impact (SC): Low
▪
Subsequent Integrity Impact (SI): Low
▪
Subsequent Availability Impact (SA): None
Affected Vendors & Systems
Vendor
Best Practical Solutions
References & Advisory Links
Metadata Profile
Database Authority
European Union Agency for Cybersecurity (ENISA) EUVD
Assigner
CERT-PL
EPSS Probability
0
Known Aliases
CVE-2026-105454
GHSA-356j-wm99-9qqc
Published On
2026-10-30
Last Updated
2026-10-30