PT-2023-7453 · Mastodon · Mastodon

Cure53 · Published 2023-07-06 · Updated 2024-03-06 · CVE-2023-36459

Positive Technologies (AI Summary)

CVSS v2.0

9.4

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:N

Name of the Vulnerable Software and Affected Versions Mastodon versions 1.3 through 3.5.8 Mastodon versions 4.0.0 through 4.0.4 Mastodon versions 4.1.0 through 4.1.2

Description The issue is related to the processing of oEmbed data in Mastodon, which can allow an attacker to bypass HTML sanitization and include arbitrary HTML in oEmbed preview cards. This can introduce a vector for cross-site scripting (XSS) payloads that can be rendered in the user's browser when a preview card for a malicious link is clicked through. An attacker can use carefully crafted oEmbed data to exploit this issue.

Recommendations For Mastodon versions 1.3 through 3.5.8, update to version 3.5.9 or later. For Mastodon versions 4.0.0 through 4.0.4, update to version 4.0.5 or later. For Mastodon versions 4.1.0 through 4.1.2, update to version 4.1.3 or later. As a temporary workaround, consider restricting the use of oEmbed preview cards until a patch is applied.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2023-08494

BIT-MASTODON-2023-36459

CVE-2023-36459

GHSA-CCM4-VGCC-73HP

Affected Products

Mastodon

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/36xxx/CVE-2023-36459.json · Exploit
• https://github.com/mastodon/mastodon/commit/6d8e0fae3e96f3cf4febe03fa7fcf5b95ff761b2 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-36459 · Security Note
• https://osv.dev/vulnerability/CVE-2023-36459 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-08494 · Security Note
• https://osv.dev/vulnerability/BIT-mastodon-2023-36459 · Vendor Advisory
• https://github.com/mastodon/mastodon/releases/tag/v4.0.5 · Note
• https://github.com/mastodon/mastodon/releases/tag/v3.5.9 · Note
• https://github.com/mastodon/mastodon/releases/tag/v4.1.3 · Note
• https://github.com/mastodon/mastodon/security/advisories/GHSA-ccm4-vgcc-73hp · Note
• https://t.me/true_secator/4597 · Telegram Post
• https://t.me/purple_medved/70 · Telegram Post
• https://t.me/echeloneyes/1725 · Telegram Post
• https://t.me/cvenotify/53825 · Telegram Post
• http://openwall.com/lists/oss-security/2023/07/06/5 · Note