Vulnerability · Published Feb 22, 2021 · Assigned by mitre

CVE-2021-27279

Medium 5.4

In plain English

A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities).

Severity (CVSS NVD)5.4Medium

Exploit odds (30 days)1.0%top 38.3% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode).

Affected products (as reported)

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

References

https://mybb.com/versions/1.8.25/ x_refsource_MISC
https://github.com/mybb/mybb/security/advisories/GHSA-6483-hcpp-p75w x_refsource_CONFIRM
https://github.com/mybb/mybb/commit/cb781b49116bf5c4d8deca3e17498122b701677a x_refsource_CONFIRM