What is CVE-2022-43707?

CVE-2022-43707 is a medium-severity vulnerability in Mybb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-11-22.

How severe is CVE-2022-43707?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mybb

CVE-2022-43707

MyBB 1.8.31 has a Cross-site scripting (XSS) vulnerability in the visual MyCode editor (SCEditor) allows remote attackers to inject HTML via user input or stored data

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-11-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Mybb

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

mybb.com (Product)
github.com/mybb/mybb/security/advisories/GHSA-6vpw-m83q-27px (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-43707?: CVE-2022-43707 is a medium-severity vulnerability in Mybb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-11-22.
How severe is CVE-2022-43707?: Medium severity. CVSS v3 base score is 6.1 out of 10.