Stored XSS in Request Tracker

published 2025-10-24 12 mo ago modified 2026-10-08 31 d ago also EUVD-2025-35802

cvss: 5.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits: 0; none known

The Request Tracker software is vulnerable to a Stored XSS vulnerability in calendar invitation parsing feature, which displays invitation data without HTML sanitization. XSS vulnerability allows an attacker to send a specifically crafted e-mail enabling JavaScript code execution by displaying the ticket in the context of the logged-in user.

This vulnerability affects versions from 5.0.4 through 5.0.8 and from 6.0.0 through 6.0.1.

Patch / fix

distros 1

request-tracker5 Debian 13 5.0.7+dfsg-4+deb13u1
request-tracker5 Debian 14 5.0.7+dfsg-5

debian advisories DEBIAN-CVE-2025-9158

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 12 mo ago (2025-10-24)

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Best Practical Request Tracker

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

cert.pl /en/posts/2025/10/CVE-2025-9158/
third-party-advisory
requesttracker.com /request-tracker/
product

Sources

CVE List CVE-2025-9158
NVD CVE-2025-9158

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary