CVE-2021-27890

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

SQL Injection vulnerablity in MyBB before 1.8.26 via theme properties included in theme XML files.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-89

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.htmlThird Party Advisory, VDB Entry
https://blog.sonarsource.com/mybb-remote-code-execution-chainExploit, Third Party Advisory
https://github.com/mybb/mybb/security/advisories/GHSA-r34m-ccm8-mfhqPatch, Release Notes, Third Party Advisory
http://packetstormsecurity.com/files/161908/MyBB-1.8.25-Remote-Command-Execution.htmlThird Party Advisory, VDB Entry
https://blog.sonarsource.com/mybb-remote-code-execution-chainExploit, Third Party Advisory
https://github.com/mybb/mybb/security/advisories/GHSA-r34m-ccm8-mfhqPatch, Release Notes, Third Party Advisory

Timeline

Published: Mar 15, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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