What is CVE-2022-24123?

CVE-2022-24123 is a critical-severity vulnerability in Marktext, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2022-01-29.

How severe is CVE-2022-24123?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Is CVE-2022-24123 known to be exploited?

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

XSS in Marktext

CVE-2022-24123

MarkText through 0.16.3 does not sanitize the input of a mermaid block before rendering. This could lead to Remote Code Execution via a .md file containing a mutation Cross-Site Scripting (XSS) payload.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-01-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (79.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Marktext

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

References

github.com/marktext/marktext/issues/2946 (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/marktext/marktext/pull/2947 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-24123?: CVE-2022-24123 is a critical-severity vulnerability in Marktext, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2022-01-29.
How severe is CVE-2022-24123?: Critical severity. CVSS v3 base score is 9.0 out of 10.
Is CVE-2022-24123 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.