Priority MEDIUM 43
MyBB is free and open source forum software.
CVSS 3.1CRITICAL 9.3· Network · No auth · User interaction · EPSS 0.00547 · Published 2026-08-18 · Fixed in 1.8.40 CWE-83
Priority MEDIUM 51
MyBB is free and open source forum software.
CVSS 3.1CRITICAL 9.8· Network · No auth · No interaction · EPSS 0.01149 · Published 2026-08-18 · Fixed in 1.8.40 CWE-94
Priority LOW 20
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 4.6· Network · Low privileges · User interaction · EPSS 0.00182 · Published 2026-08-18 · Fixed in 1.8.40 CWE-352
Priority LOW 20
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 4.3· Network · Low privileges · No interaction · EPSS 0.00336 · Published 2026-08-18 · Fixed in 1.8.40 CWE-862
Priority LOW 24
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 5.4· Network · Low privileges · No interaction · EPSS 0.00304 · Published 2026-08-18 · Fixed in 1.8.40 CWE-639
Priority LOW 20
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 4.3· Network · Low privileges · No interaction · EPSS 0.00366 · Published 2026-08-18 · Fixed in 1.8.40 CWE-252
Priority LOW 31
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 5.3· Network · No auth · No interaction · EPSS 0.00551 · Published 2026-08-18 · Fixed in 1.8.40 CWE-837
Priority LOW 30
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 5.3· Network · No auth · No interaction · EPSS 0.00412 · Published 2026-08-18 · Fixed in 1.8.40 CWE-93
Priority LOW 20
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 4.3· Network · Low privileges · No interaction · EPSS 0.00336 · Published 2026-08-18 · Fixed in 1.8.40 CWE-863
Priority LOW 20
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 4.6· Network · Low privileges · User interaction · EPSS 0.00168 · Published 2026-08-18 · Fixed in 1.8.40 CWE-352
Priority LOW 16
MyBB is free and open source forum software.
CVSS 3.1LOW 3.5· Network · Low privileges · User interaction · EPSS 0.00173 · Published 2026-08-18 · Fixed in 1.8.40 CWE-352
Priority MEDIUM 40
MyBB is free and open source forum software.
CVSS 3.1HIGH 8.7· Network · Low privileges · User interaction · EPSS 0.0043 · Published 2026-08-18 · Fixed in 1.8.40 CWE-79
Priority MEDIUM 40
MyBB is free and open source forum software.
CVSS 3.1HIGH 8.7· Network · Low privileges · User interaction · EPSS 0.00416 · Published 2026-08-18 · Fixed in 1.8.40 CWE-79
Priority LOW 20
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 4.3· Network · Low privileges · No interaction · EPSS 0.00342 · Published 2026-08-18 · Fixed in 1.8.40 CWE-863
Priority LOW 30
### Impact The registration component does not validate the text-based _Security Question_ CAPTCHA correctly, allowing attackers to bypass the challenge via a specially crafted value.
CVSS 3.1MEDIUM 5.3· Network · No auth · No interaction · EPSS 0.00448 · Published 2026-08-18 · Fixed in 1.8.40 CWE-636
Priority LOW 20
MyBB is free and open source forum software.
CVSS 3.1MEDIUM 4.3· Network · Low privileges · No interaction · EPSS 0.00367 · Published 2026-08-18 · Fixed in 1.8.40 CWE-918
Priority LOW 16
MyBB is free and open source forum software.
CVSS 3.1LOW 3.5· Network · Low privileges · User interaction · EPSS 0.00173 · Published 2026-08-18 · Fixed in 1.8.40 CWE-352
Priority LOW 16
MyBB is free and open source forum software.
CVSS 3.1LOW 3.5· Network · Low privileges · User interaction · EPSS 0.00173 · Published 2026-08-18 · Fixed in 1.8.40 CWE-352
Priority HIGH 70
MyBB Timeline Plugin 1.0 contains cross-site scripting vulnerabilities that allow attackers to inject malicious scripts through thread titles, post content, and user profile fields like Location and Bio.
CVSS 4.0MEDIUM 6.9· Network · No auth · No interaction · EPSS 0.00232 · Published 2026-05-16 · No fix listed CWE-79
Priority MEDIUM 62
MyBB Recent threads 17.0 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts by creating threads with crafted subject lines.
CVSS 4.0MEDIUM 5.1· Network · Low privileges · User interaction · EPSS 0.00261 · Published 2026-04-29 · No fix listed CWE-79
Priority MEDIUM 62
MyBB Last User's Threads in Profile Plugin 1.2 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts by crafting thread subjects with script tags.
CVSS 4.0MEDIUM 5.1· Network · Low privileges · User interaction · EPSS 0.00209 · Published 2026-04-04 · No fix listed CWE-79
Priority MEDIUM 56
MyBB My Arcade Plugin 1.3 contains a persistent cross-site scripting vulnerability that allows authenticated users to inject malicious scripts through arcade game score comments.
CVSS 4.0MEDIUM 5.1· Network · Low privileges · User interaction · EPSS 0.00264 · Published 2026-04-04 · No fix listed CWE-79
Priority MEDIUM 56
MyBB Downloads Plugin 2.0.3 contains a persistent cross-site scripting vulnerability that allows regular members to inject malicious scripts through the download title field.
CVSS 4.0MEDIUM 5.1· Network · Low privileges · User interaction · EPSS 0.00234 · Published 2026-04-04 · No fix listed CWE-79
Priority MEDIUM 56
MyBB Like Plugin 3.0.0 contains a stored cross-site scripting vulnerability.
CVSS 4.0MEDIUM 5.1· Network · No auth · User interaction · EPSS 0.00237 · Published 2026-04-04 · No fix listed CWE-79
Priority MEDIUM 56
MyBB Delete Account Plugin 1.4 contains a cross-site scripting vulnerability in the account deletion reason input field.
CVSS 4.0MEDIUM 5.1· Network · Low privileges · User interaction · EPSS 0.00247 · Published 2026-01-23 · No fix listed CWE-79
Load more