Is CVE-2026-31845 actively exploited?

No active exploitation of CVE-2026-31845 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-31845 be exploited remotely?

Yes. CVE-2026-31845 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-31845?

CVE-2026-31845 has a CVSS score of 9.3 (CRITICAL).

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CRITICAL

CVE-2026-31845

CWE-79Published: April 11, 2026· Updated: Apr 13, 2026

9.3

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:3.9th

Official Description

A reflected cross-site scripting (XSS) vulnerability exists in Rukovoditel CRM version 3.6.4 and earlier in the Zadarma telephony API endpoint (/api/tel/zadarma.php). The application directly reflects user-supplied input from the 'zd_echo' GET parameter into the HTTP response without proper sanitization, output encoding, or content-type restrictions.

The vulnerable code is:

if (isset($_GET['zd_echo'])) exit($_GET['zd_echo']);

An unauthenticated attacker can exploit this issue by crafting a malicious URL containing JavaScript payloads. When a victim visits the link, the payload executes in the context of the application within the victim's browser, potentially leading to session hijacking, credential theft, phishing, or account takeover.

The issue is fixed in version 3.7, which introduces proper input validation and output encoding to prevent script injection.

NVD Source

Technical Analysis

CVE-2026-31845 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.3.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.