A Cross Site Scripting (XSS) vulnerability exists in htmly.2.8.1 via the Copyright field in the /admin/config page.

published 2022-03-31 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29901

cvss: 4.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

Exploit prediction

0.56% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

rlsec.xyz http://rlsec.xyz/vulns/CVE_2021_42946.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

rlsec.xyz /vulns/CVE_2021_42946.html
exploit, third-party-advisory

Sources

CVE List CVE-2021-42946
NVD CVE-2021-42946

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary