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TI-2021-18849 Aliases CVE-2021-42564GHSA-pq7g-984r-4j7x

An open redirect through HTML injection in confidential messages in Cryptshare before…

Priority LOW 26CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-601.

Summary

An open redirect through HTML injection in confidential messages in Cryptshare before 5.1.0 allows remote attackers (with permission to provide confidential messages via Cryptshare) to redirect targeted victims to any URL via the '<meta http-equiv="refresh"' substring in the editor parameter.

Why it matters now

EPSS 0.00687 52nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cryptshare:cryptshare_server:*:*:*:*:*:*:*:*before 5.1.0VulnerableCryptshare
  • cpe:2.3:a:cryptshare:cryptshare_server:*:*:*:*:*:*:*:* Versions before 5.1.0 Vulnerable ·Cryptshare

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42564
  2. 2026-10-03 Alias added: GHSA-pq7g-984r-4j7x

References

Exploit 1

  • TI-2021-02236 A cross-site scripting (XSS) vulnerability on the Delete Personal Data page in Cryptshare… CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences