CVE-2020-21101

Name: CVE-2020-21101
Creator: NVD / NIST
Published: 2021-04-29T17:15:08.877+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.61%

Last modified Jun 17, 2026

CVE-2020-21101 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Cross Site Scriptiong vulnerabilityin Screenly screenly-ose all versions, including v1.8.2 (2019-09-25-Screenly-OSE-lite.img), in the 'Add Asset' page via manipulation of a 'URL' field, which could let a remote malicious user execute arbitrary code.. EPSS estimates a 0.61% chance of exploitation in the next 30 days.

Description

Cross Site Scriptiong vulnerabilityin Screenly screenly-ose all versions, including v1.8.2 (2019-09-25-Screenly-OSE-lite.img), in the 'Add Asset' page via manipulation of a 'URL' field, which could let a remote malicious user execute arbitrary code.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.61%

44.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Screenly	Screenly	0.9
Screenly	Screenly	0.9.1
Screenly	Screenly	0.10
Screenly	Screenly	0.11
Screenly	Screenly	0.12
Screenly	Screenly	0.12.1
Screenly	Screenly	0.13
Screenly	Screenly	0.14
Screenly	Screenly	0.15
Screenly	Screenly	0.15.1
Screenly	Screenly	0.16
Screenly	Screenly	0.17
Screenly	Screenly	0.18
Screenly	Screenly	0.18.1
Screenly	Screenly	0.18.2

References

https://github.com/Screenly/screenly-ose/issues/1254Third Party Advisory
https://github.com/Screenly/screenly-ose/issues/1254Third Party Advisory

Timeline

Published: Apr 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21101?

How severe is CVE-2020-21101?

CVE-2020-21101 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.61% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21101?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-21101?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST