What is CVE-2021-43817?

CVE-2021-43817 is a high-severity vulnerability in Collaboraonline Online, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2021-12-13.

How severe is CVE-2021-43817?

High severity. CVSS v3 base score is 8.2 out of 10.

Is CVE-2021-43817 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Collaboraonline Online

CVE-2021-43817

Collabora Online is a collaborative online office suite based on LibreOffice technology. In affected versions a reflected XSS vulnerability was found in Collabora Online. An attacker could inject unescaped HTML into a variable as they crea…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (44.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N.

Affected products

Collaboraonline Online — versions >= 6.0.0, < 6.4.16, < 4.2.20

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

akemery/CVE_

References

github.com/CollaboraOnline/online/security/advisories/GHSA-7f6h-v9mx-58q9 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2021-43817?: CVE-2021-43817 is a high-severity vulnerability in Collaboraonline Online, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2021-12-13.
How severe is CVE-2021-43817?: High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2021-43817 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.