Vulnerability · CVE-2026-31845
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).
Published Apr 11, 2026 · catalog updated Aug 10, 2026 · A reflected cross-site scripting
Check if you run it
No confirmed exploitation is on record for CVE-2026-31845. EPSS is 0.48%. Act only if a listed version of A reflected cross-site scripting is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (A reflected cross-site scripting).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Critical9.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.48%
- Remediation
- Version ranges on file
- Affected products
- stated named in the record
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- stated named in the record<= 3.6.4
How to fix CVE-2026-31845
Recommended remediation
Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-31845. EPSS is 0.48%. Act only if a listed version of A reflected cross-site scripting is installed.
Which versions are affected?
Compare what you have installed with named in the record <= 3.6.4. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-79: Cross-site Scripting (XSS). EPSS 0.48%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Apr 11, 2026 · NIST NVD
Detected
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.
Aug 10, 2026 · NIST NVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2026-31845
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-31845
30-day exploitation probability 0.5%
first.org - NIST NVDVulnerability recordCVE-2026-31845
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 wit
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.