Silverstripe XSS In rewritten hash links

published 2024-05-23 2y ago modified 2024-11-28 last yr.

cvss: 6.1; version 3.1, GitHub
cisa kev: Not listed; not in CISA's catalog
epss: —; no score, EPSS covers CVEs only
public exploits: 0; none known

A high level XSS vulnerability has been discovered in the SilverStripe framework which causes links containing hash anchors (E.g. href="#anchor") to be rewritten in an unsafe way.

The rewriteHashlinks option on SSViewer will rewrite these to contain the current url, although without adequate escaping, meaning that HTML could be injected via injecting unsafe values to any page via the querystring.

Due to the nature of this issue it is likely that a large number of SilverStripe sites are affected.

Patch / fix

fixed in 1 links 2

packagist silverstripe/framework 3.0.13, 3.1.12

Is GHSA-34q6-xqxh-gq39 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CVSS scores

assigned by	version	score	vector
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	silverstripe/framework	<3.0.13 >=3.1.0, <3.1.12	3.0.13 3.1.12

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

GitHub Advisory GHSA-34q6-xqxh-gq39

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