CVE-2021-27889
MEDIUM
6.1
CVSS Score
Published: March 15, 2021 at 04:57 PM UTC
Updated: June 17, 2026 at 03:45 AM UTC
1 product affected across 1 vendorMybb
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Severity
MEDIUM6.1
Exploit prediction
EPSS 5%
Description
Cross-site Scripting (XSS) vulnerability in MyBB before 1.8.26 via Nested Auto URL when parsing messages.
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_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.htmlx_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://blog.sonarsource.com/mybb-remote-code-execution-chainx_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/mybb/mybb/security/advisories/GHSA-xhj7-3349-mqcmCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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