CVE-2021-27947

Name: CVE-2021-27947
Creator: NVD / NIST
Published: 2021-03-15T18:15:18.83+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2021-27947 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. SQL Injection vulnerability in MyBB before 1.8.26 via the Copy Forum feature in Forum Management. (issue 2 of 3).. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

SQL Injection vulnerability in MyBB before 1.8.26 via the Copy Forum feature in Forum Management. (issue 2 of 3).

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

0.90%

55.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Mybb	Mybb	< 1.8.26

References

https://github.com/mybb/mybb/security/advisories/GHSA-jjx8-8mcp-7h65Patch, Release Notes, Third Party Advisory
https://github.com/mybb/mybb/security/advisories/GHSA-jjx8-8mcp-7h65Patch, Release Notes, Third Party Advisory

Timeline

Published: Mar 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27947?

SQL Injection vulnerability in MyBB before 1.8.26 via the Copy Forum feature in Forum Management. (issue 2 of 3).

How severe is CVE-2021-27947?

CVE-2021-27947 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27947?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27947?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST