PT-2020-13567 · Bitrix+1 · Bitrix24+1

Mariusz Poplawski · Published 2020-06-24 · Updated 2025-11-15 · CVE-2020-13484

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Bitrix24 versions prior to 20.0.976

Description The issue allows for Server-Side Request Forgery (SSRF) via an intranet IP address in the "services/main/ajax.php?action=attachUrlPreview" API endpoint, specifically through the url parameter. This occurs when the destination URL hosts an HTML document containing a '<meta name="og:image" content="' tag followed by an intranet URL.

Recommendations For Bitrix24 versions prior to 20.0.976, as a temporary workaround, consider restricting access to the "services/main/ajax.php?action=attachUrlPreview" API endpoint until a patch is available. Avoid using the url parameter in this endpoint with potentially malicious URLs.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2020-13484

Affected Products

Bitrix

Bitrix24

References · 3

• 🔥 https://gist.github.com/mariuszpoplwski/f261a4bc06adde5c78760559db9d63bd · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-13484 · Security Note
• https://osv.dev/vulnerability/CVE-2020-13484 · Vendor Advisory