MyBB Downloads Plugin 2.0.3 Persistent XSS via downloads.php
Published Apr 4, 2026
5.1
MEDIUMCVSS 4.0
EPSS 0.22%
Description
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. Attackers can submit a new download with HTML/JavaScript code in the title parameter, which executes when administrators validate the download in downloads.php.
Affected products
-
- Version 2.0.3StatusaffectedConstraints-
- 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 Downloads Plugin | n/a |
|
- 2.0.3
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:N/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 2, 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 2, 2026 | 0.22% (0.00225) | 12.01th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.22% (0.00225) | 12.99th | 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=854 productPermissions Required
- https://www.exploit-db.com/exploits/44400 exploitVDB Entry
- https://www.vulncheck.com/advisories/mybb-downloads-plugin-persistent-xss-via-downloads-php third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://community.mybb.com/mods.php?action=view&pid=854 | productPermissions Required | |
| https://www.exploit-db.com/exploits/44400 | exploitVDB Entry | |
| https://www.vulncheck.com/advisories/mybb-downloads-plugin-persistent-xss-via-downloads-php | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.