SQL Injection vulnerablity in MyBB before 1.8.26 via theme properties included in theme XML files.
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This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 2.5%, top 14% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
SQL Injection vulnerablity in MyBB before 1.8.26 via theme properties included in theme XML files.
March 15, 2021
November 21, 2024
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Working exploit code is in the public domain (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
Mybb associate CVE-2021-27890 & CVE-2021-27889 to RCE poc
Open source ↗MyBB 1.8.25 - Chained Remote Command Execution
Open source ↗See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-27890
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