CVE-2021-27949

6.1 mediumEPSS 0.7%

Medium (6.1) in mybb mybb. EPSS 0.7% chance of exploitation in the next 30 days.

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

Severity

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2021-03-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19