XSS in Best Practical Request Tracker
CVE-2026-6841
Request Tracker is vulnerable to a reflected cross-site scripting (XSS) vulnerability via the "Page" parameter in GET requests. An attacker can craft a URL that, when opened, results in arbitrary JavaScript execution in the victim’s browser. This vulnerability affects versions from 5.0.4 up to 5.0.9 and from 6.0.0 up to 6.0.2.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Best Practical Request Tracker — versions 5.0.4, 6.0.0
- Bestpractical Request Tracker
Weakness classification (CWE)
References
- cert.pl/en/posts/2026/05/CVE-2026-6841 (Third Party Advisory, third-party-advisory)
- requesttracker.com/request-tracker/ (Product, product)
- docs.bestpractical.com/release-notes/rt/5.0.10 (release-notes, Release Notes)
- docs.bestpractical.com/release-notes/rt/6.0.3 (release-notes, Release Notes)
Frequently asked questions
- What is CVE-2026-6841?
- CVE-2026-6841 is a medium-severity vulnerability in Best Practical Request Tracker, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-21.
- How severe is CVE-2026-6841?
- Medium severity. CVSS v3 base score is 6.1 out of 10.