What is CVE-2022-4839?

CVE-2022-4839 is a medium-severity vulnerability in Usememos Memos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-12-29.

How severe is CVE-2022-4839?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Usememos Memos

CVE-2022-4839

Cross-site Scripting (XSS) - Stored in GitHub repository usememos/memos prior to 0.9.1.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-12-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Usememos Memos
Usememos Usememos/memos — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/usememos/memos/commit/64e5c343c5f74b0abdf3ac0d21a6139daea58cf8 (Patch, Third Party Advisory)
huntr.dev/bounties/ad954cab-f026-4895-8003-99f5e3b507ed (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-4839?: CVE-2022-4839 is a medium-severity vulnerability in Usememos Memos, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-12-29.
How severe is CVE-2022-4839?: Medium severity. CVSS v3 base score is 5.4 out of 10.