MyBB My Arcade Plugin 1.3 Persistent XSS via Comment
Published Apr 4, 2026
5.1
MEDIUMCVSS 4.0
EPSS 0.25%
Description
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. Attackers can add crafted HTML and JavaScript payloads in the comment field that execute when other users view or edit the comment.
Affected products
-
- Version 1.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| MyBB | MyBB My Arcade Plugin | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Apr 6, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Apr–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.25% (0.00254) | 15.42th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.25% (0.00254) | 16.54th | v5 (v2026.06.15) |
| Apr 5, 2026 | 0.03% (0.00029) | 8.11th | v4 (v2025.03.14) |
References (3)
- https://community.mybb.com/mods.php?action=view&pid=411 product
- https://www.exploit-db.com/exploits/44186 exploitVDB Entry
- https://www.vulncheck.com/advisories/mybb-my-arcade-plugin-persistent-xss-via-comment third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://community.mybb.com/mods.php?action=view&pid=411 | product | |
| https://www.exploit-db.com/exploits/44186 | exploitVDB Entry | |
| https://www.vulncheck.com/advisories/mybb-my-arcade-plugin-persistent-xss-via-comment | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.