CVE-2021-30637
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
- Record
CVE-2021-30637- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
- Record
CVE-2021-30637- Updated
- 2026-11-02
EUVDEUVD-2021-17557 No score
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
- Record
EUVD-2021-17557- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4h65-85ww-qq7p No score
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
- Record
GHSA-4h65-85ww-qq7p- Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
htmly 2.8.0 allows stored XSS via the blog title, Tagline, or Description to config.html.php.
- Record
CVE-2021-30637- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | htmly 2.8.0 - 'description' Stored Cross-Site Scripting (XSS) | 2021-04-15 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-30637 is a medium vulnerability (CVSS 5.4) in Htmly, published April 13, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.90%, the 79th percentile. No source names a fixed version.