Stored XSS in link tags added via XHR in SilverStripe Framework

published 2022-06-29 4 y ago modified 2026-06-17 4 mo ago also BIT-silverstripe-2022-28803 , EUVD-2022-6152 , GHSA-rppc-655v-7j3c

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits: 0; none known

In SilverStripe Framework through 2022-04-07, Stored XSS can occur in javascript link tags added via XMLHttpRequest (XHR).

Patch / fix

fixed in 3

packagist silverstripe/framework 4.10.9
bitnami silverstripe 4.10.9
silverstripe silverstripe 4.10.9

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
GitHub	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
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
OSV	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	silverstripe/framework	>=4.0.0, <4.10.9	4.10.9
bitnami	silverstripe	<4.10.9	4.10.9

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

silverstripe.org /download/security-releases/cve-2022-28803
web, vendor-advisory
silverstripe.org
product, web
nvd.nist.gov /vuln/detail/CVE-2022-28803
advisory
github.com /FriendsOfPHP/security-advisories/blob/master/silverstripe/framework/CVE-2022-28803.yaml
web

Sources

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