CVE-2020-15249

low-risk
Published 2020-11-23

October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October CMS from version 1.0.319 and before version 1.0.469, backend users with access to upload files were permitted to upload SVG files without any sanitization applied to the uploaded files. Since SVG files support being parsed as HTML by browsers, this means that they could theoretically upload Javascript that would be executed on a path under the website's domain (i.e. /storage/app/media/evil.svg), but they would have to convince their target to visit that location directly in the target's browser as the backend does not display SVGs inline anywhere, SVGs are only displayed as image resources in the backend and are thus unable to be executed. Issue has been patched in Build 469 (v1.0.469) & v1.1.0.

Do I need to act?

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0.17% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
2
CVSS 2.8/10 Low
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Octobercms

References (4)

Patch https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f3...
Third Party Advisory https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q
Patch https://github.com/octobercms/library/commit/80aab47f044a2660aa352450f55137598f3...
Third Party Advisory https://github.com/octobercms/october/security/advisories/GHSA-fx3v-553x-3c4q
17
/ 100
low-risk
Severity 11/34 · Low
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal