What is CVE-2020-13429?

CVE-2020-13429 is a medium-severity vulnerability in Grafana Piechart-Panel, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-05-24.

How severe is CVE-2020-13429?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Grafana Piechart-Panel

CVE-2020-13429

legend.ts in the piechart-panel (aka Pie Chart Panel) plugin before 1.5.0 for Grafana allows XSS via the Values Header (aka legend header) option.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-05-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Grafana Piechart-Panel

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/grafana/piechart-panel/releases/tag/v1.5.0 (Third Party Advisory, Release Notes)
github.com/grafana/piechart-panel/issues/218 (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-13429?: CVE-2020-13429 is a medium-severity vulnerability in Grafana Piechart-Panel, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-05-24.
How severe is CVE-2020-13429?: Medium severity. CVSS v3 base score is 5.4 out of 10.