CVE-2021-41866
5.4 MEDIUMMyBB before 1.8.28 allows stored XSS because the displayed Template Name value in the Admin CP's theme management is not escaped properly
Published: 2021-10-26 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 5.4 MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CWE
- CWE-79
Affected products
| Vendor | Product |
|---|---|
| mybb | mybb |
Description
MyBB before 1.8.28 allows stored XSS because the displayed Template Name value in the Admin CP's theme management is not escaped properly.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-41866
- [Other]https://github.com/mybb/mybb/security/advisories/
- [Patch]https://github.com/mybb/mybb/security/advisories/GHSA-gxhv-r3m5-6qv7
- [Other]https://github.com/mybb/mybb/security/advisories/
- [Patch]https://github.com/mybb/mybb/security/advisories/GHSA-gxhv-r3m5-6qv7
Related CVEs
Same vendor
- CVE-2018-25247 — MyBB Like Plugin 3.0.0 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts by creating posts ... (6.1 MEDIUM)
Same CWE
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- CVE-2026-54198 — Unauthenticated Cross Site Scripting (XSS) in Media LIbrary Assistant <= 3.35 versions (7.1 HIGH)
- CVE-2026-54191 — Unauthenticated Cross Site Scripting (XSS) in Pods <= 3.3.8 versions (7.1 HIGH)
- CVE-2026-39437 — Unauthenticated Cross Site Scripting (XSS) in Min Max Step Quantity Limits Manager for WooCommerce <= 5.2.2 versions (7.1 HIGH)