Rukovoditel CRM Reflected XSS via zd_echo Parameter in Zadarma Telephony API Endpoint (CVE-2026-31845) | HOL Guard CVE

Critical · CVSS 9.3CVE-2026-31845

Rukovoditel CRM Reflected XSS via zd_echo Parameter in Zadarma Telephony API Endpoint

Answer in brief

CVE-2026-31845 records a Critical severity (CVSS 9.3) vulnerability in Rukovoditel CRM Reflected XSS via zd_echo Parameter in Zadarma Telephony API Endpoint. The current sources do not mark it as known exploited. The current feed maps Rukovoditel/Rukovoditel CRM (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Apr 11, 2026Updated Aug 10, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Aug 10, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Rukovoditel/Rukovoditel CRM (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Rukovoditel/Rukovoditel CRMgeneric	3.6.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Rukovoditel/Rukovoditel CRM.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Apr 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Source referenceforum.rukovoditel.net

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.