CVE-2020-15500: An issue was discovered in server.js in TileServer GL through 3.0.0

Q: How do I fix CVE-2020-15500?

tileservergl: upgrade to newer than 3.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-15500 being exploited?

CVE-2020-15500 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-15500 affect?

CVE-2020-15500 affects tileservergl. Severity is medium (CVSS 6.1). 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.

Q: How urgent is CVE-2020-15500?

Priority 50/100. EPSS top 4%: very likely to be exploited; Public exploit reference

This week

MEDIUM 6.1UPGRADE

CVE-2020-15500 is a medium-severity flaw (CVSS 6.1) affecting tileservergl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

EPSS top 4%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	12.2% (top 4%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-07-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tileserver

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-07-01 23:15 UTCPublished CVE record published
2026-06-17 02:56 UTCUpdated Record last modified

tileserver tileservergl UPGRADE

Affected: <= 3.0.0

Fixed in: newer than 3.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tileservergl || rpm -q tileservergl || tileservergl --version

2. UPGRADE to newer than 3.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tileservergl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tileservergl

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Tileserver-gl 3.0.0 - 'key' Reflected Cross-Site Scripting (XSS)
Nuclei scan template: TileServer GL <=3.0.0 - Cross-Site Scripting

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-15500?

tileservergl: upgrade to newer than 3.0.0. Exact commands for each OS are on this page.

Is CVE-2020-15500 being exploited?

CVE-2020-15500 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-15500 affect?

CVE-2020-15500 affects tileservergl. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2020-15500?

Priority 50/100. EPSS top 4%: very likely to be exploited; Public exploit reference

References

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