What is CVE-2020-15500?

CVE-2020-15500 is a medium-severity vulnerability in Tileserver Tileservergl, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-07-01.

How severe is CVE-2020-15500?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2020-15500 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Tileserver Tileservergl

CVE-2020-15500

An issue was discovered in server.js in TileServer GL through 3.0.0. The content of the key GET parameter is reflected unsanitized in an HTTP response for the application's main page, causing reflected XSS.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-07-01 · last modified 2026-06-17.

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: 0.122 (96.1th percentile), scored 2026-10-03.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.122 · newest: 0.122 · change: 0.000

Affected products

Tileserver Tileservergl

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/maptiler/tileserver-gl/issues/461 (Exploit, Third Party Advisory)
packetstormsecurity.com/files/162193/Tileserver-gl-3.0.0-Cross-Site-Scripting.h… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2020-15500?: CVE-2020-15500 is a medium-severity vulnerability in Tileserver Tileservergl, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-07-01.
How severe is CVE-2020-15500?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2020-15500 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.