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Case File

CVE-2021-27279

MEDIUM · CVSS 5.4 EPSS 0.96% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-02-22 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.4. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-27279
Severity
MEDIUM
CVSS
5.4
EPSS
0.96%

Original NVD Description

MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode).

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2018-25250 HIGH CVE-2018-25249 MEDIUM CVE-2018-25248 HIGH CVE-2018-25247 MEDIUM CVE-2021-47905 MEDIUM CVE-2018-25132 MEDIUM