CVE-2021-27279
MEDIUM
5.4
CVSS Score
Published: February 22, 2021 at 07:04 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
1 product affected across 1 vendorMybb
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Severity
MEDIUM5.4
Exploit prediction
EPSS 1.0%
Description
MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode).
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (3)
x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/mybb/mybb/commit/cb781b49116bf5c4d8deca3e17498122b701677ax_refsource_CONFIRMExploitThird Party Advisory
Source: [email protected]
https://github.com/mybb/mybb/security/advisories/GHSA-6483-hcpp-p75wx_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://mybb.com/versions/1.8.25/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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