Cross-site Scripting (XSS) - Stored in getgrav/grav

published 2021-10-27 5 y ago modified 2026-06-17 4 mo ago also GHSA-5jxc-hmqf-3f73 , EUVD-2021-2302

cvss: 6.3; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits: 0; none known

grav is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Patch / fix

fixed in 2 links 2

packagist getgrav/grav 1.7.24
getgrav getgrav/grav 1.7.24

github.com/getgrav/grav@afc69a3 commit
huntr.dev/bounties/b1182515-d911-4da9-b4f7-b4c341a62a8d advisory

Exploit prediction

0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

huntr.dev https://huntr.dev/bounties/b1182515-d911-4da9-b4f7-b4c341a62a8d referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	6.3	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/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
GitHub	3.0	6.3	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
packagist	getgrav/grav	<1.7.24	1.7.24

Affected products

getgrav getgrav/grav

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /getgrav/grav/commit/afc69a3229bb6fe120b2c1ea27bc6f196ed7284d
web, patch, third-party-advisory
huntr.dev /bounties/b1182515-d911-4da9-b4f7-b4c341a62a8d
web, exploit, issue-tracking, patch, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-3904
advisory
github.com /getgrav/grav
web

Sources

CVE List CVE-2021-3904
GitHub Advisory GHSA-5jxc-hmqf-3f73
NVD CVE-2021-3904

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