CVE-2021-30637

Name: CVE-2021-30637
Creator: NVD / NIST
Published: 2021-04-13T05:15:13.993+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 1.90%

Last modified Jun 17, 2026

CVE-2021-30637 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.. EPSS estimates a 1.90% chance of exploitation in the next 30 days.

Description

htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.

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

1.90%

77.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Htmly	Htmly	2.8.0

References

http://packetstormsecurity.com/files/162195/htmly-2.8.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/danpros/htmly/issues/456Exploit, Third Party Advisory
http://packetstormsecurity.com/files/162195/htmly-2.8.0-Cross-Site-Scripting.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/danpros/htmly/issues/456Exploit, Third Party Advisory

Timeline

Published: Apr 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30637?

htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.

How severe is CVE-2021-30637?

CVE-2021-30637 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 1.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30637?

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-2021-30637?

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

Scan your code now

Source: NVD / NIST