What happened
MyBB XSS and SQL injection chain (CVE-2021-27889/27890) enabling remote code execution.
Affected versions
Unknown product: See original advisory Fixed: See vendor advisory.
Why it matters
This source correlation may provide earlier visibility while structured CVE metadata is still being updated.
Detection & mitigation
- Review the original advisory and validate affected versions.
- Apply vendor-provided updates or mitigations when available.
Public PoC references
RepositoryAuthorFirst seenReference
Exploit-DB 49696MyBB 1.8.25 - Chained Remote Command ExecutionSivertPL2021-03-22VerifiedSploitusMyBB XSS and SQL injection chain (CVE-2021-27889/27890) enabling remote code execution.KitPloit2026-10-10T08:11:11Candidatekitploit.comMyBB XSS and SQL injection chain (CVE-2021-27889/27890) enabling remote code execution.hi2026-10-10T08:11:11CandidateSource timeline
Discovered through Exploit-DBView source ↗
Record history
Record created from the first normalized source observation.
Metadata and source references refreshed.