What is CVE-2021-36803?

CVE-2021-36803 is a medium-severity vulnerability in Akaunting, classified under Cross-site Scripting. CVSS score: 6.3/10. Published 2021-08-04.

How severe is CVE-2021-36803?

Medium severity. CVSS v3 base score is 6.3 out of 10.

XSS in Akaunting

CVE-2021-36803

Akaunting version 2.1.12 and earlier suffers from a persistent (type II) cross-site scripting (XSS) vulnerability in processing user-supplied avatar images. This issue was fixed in version 2.1.13 of the product.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Akaunting — versions 2.1.12

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.rapid7.com/blog/post/2021/07/27/multiple-open-source-web-app-vulnerabilitie… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-36803?: CVE-2021-36803 is a medium-severity vulnerability in Akaunting, classified under Cross-site Scripting. CVSS score: 6.3/10. Published 2021-08-04.
How severe is CVE-2021-36803?: Medium severity. CVSS v3 base score is 6.3 out of 10.