What’s Vulnerable › Vulnerabilities

CVE-2021-43444

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-23 · updated 2026-06-17
• Weakness: CWE-287

Description

ONLYOFFICE all versions as of 2021-11-08 is affected by Incorrect Access Control. Signed document download URLs can be forged due to a weak default URL signing key.

Affected products

• ONLYOFFICE Server: through 7.0.0.49

References

• https://github.com/ONLYOFFICE/server
• https://labs.nettitude.com/blog/exploiting-onlyoffice-web-sockets-for-unauthenticated-remote-code-execution/
• https://www.onlyoffice.com/
• https://github.com/ONLYOFFICE/server
• https://labs.nettitude.com/blog/exploiting-onlyoffice-web-sockets-for-unauthenticated-remote-code-execution/
• https://www.onlyoffice.com/

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