XSS in Mybb

CVE-2021-27949

Cross-site Scripting vulnerability in MyBB before 1.8.26 via Custom moderator tools.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.006 (46.3th percentile) — read the EPSS interpretation.

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.

Affected products

Mybb
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2021-27949?: CVE-2021-27949 is a medium-severity vulnerability in Mybb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-03-15.
How severe is CVE-2021-27949?: Medium severity. CVSS v3 base score is 6.1 out of 10.