PT-2026-32508 · Espocrm · Espocrm

Entrovyx · Published 2026-04-13 · Updated 2026-04-14 · CVE-2026-33534

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions EspoCRM versions prior to 9.3.4

Description An authenticated Server-Side Request Forgery (SSRF) allows bypassing internal-host validation by using alternative IPv4 representations, such as octal notation. This occurs because the HostCheck::isNotInternalHost() function relies on filter var(..., FILTER VALIDATE IP), which does not recognize alternative IP formats. This causes the validation to fall through to a DNS lookup that returns no records, incorrectly treating the host as safe. Subsequently, cURL normalizes the address and connects to the loopback destination. Through the '/api/v1/Attachment/fromImageUrl' endpoint, an authenticated user can force the server to make requests to loopback-only services and store the response as an attachment, potentially allowing access to internal resources.

Recommendations Update to version 9.3.4. As a temporary workaround, restrict access to the '/api/v1/Attachment/fromImageUrl' endpoint to minimize the risk of exploitation.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-33534

Affected Products

Espocrm

References · 5

• 🔥 https://github.com/espocrm/espocrm/releases/tag/9.3.4 · Exploit
• 🔥 https://github.com/espocrm/espocrm/security/advisories/GHSA-h7gx-8gwv-7g73 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-33534 · Security Note
• https://twitter.com/VulmonFeeds/status/2043919032122810772 · Twitter Post
• https://twitter.com/CVEnew/status/2043976210187690354 · Twitter Post