What is CVE-2021-32744?

CVE-2021-32744 is a critical-severity vulnerability in Collabora Online, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2021-07-21.

How severe is CVE-2021-32744?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Collabora Online

CVE-2021-32744

Collabora Online is a collaborative online office suite. In versions prior to 4.2.17-1 and version 6.4.9-5, unauthenticated attackers are able to gain access to files which are currently opened by other users in the Collabora Online editor. For successful exploitation the attacker is required to guess the file identifier - the predictability of this file identifier is dependent on external file-storage implementations (this is a potential "IDOR" - Insecure Direct Object Reference - vulnerability). Versions 4.2.17-1 and 6.4.9-5 contain patches for this issue. There is no known workaround except updating the Collabora Online application to one of the patched releases.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.011 (62.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Collabora Online
Collaboraonline Online — versions < 4.2.17-1, >= 6.4.0, < 6.4.9-5

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-32744?: CVE-2021-32744 is a critical-severity vulnerability in Collabora Online, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 9.8/10. Published 2021-07-21.
How severe is CVE-2021-32744?: Critical severity. CVSS v3 base score is 9.8 out of 10.