CVE-2023-42452

Severity CVSS v4.0:

Pending analysis

Type:

CWE-79 Cross-Site Scripting (XSS)

Publication date:

19/09/2023

Last modified:

22/09/2023

Description

Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.x branch prior to versions 4.0.10, 4.2.8, and 4.2.0-rc2, under certain conditions, attackers can abuse the translation feature to bypass the server-side HTML sanitization, allowing unescaped HTML to execute in the browser. The impact is limited thanks to Mastodon&#39;s strict Content Security Policy, blocking inline scripts, etc. However a CSP bypass or loophole could be exploited to execute malicious XSS. Furthermore, it requires user interaction, as this can only occur upon clicking the “Translate” button on a malicious post. Versions 4.0.10, 4.2.8, and 4.2.0-rc2 contain a patch for this issue.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.40 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x

5.40

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:joinmastodon:mastodon::::::::	4.0.0 (including)	4.0.10 (excluding)
cpe:2.3:a:joinmastodon:mastodon::::::::	4.1.0 (including)	4.1.8 (excluding)
cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta1::::::
cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta2::::::
cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta3::::::
cpe:2.3:a:joinmastodon:mastodon:4.2.0:rc1::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2023-42452

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools