MEDIUM
MyBB Recent threads 17.0 Persistent Cross-Site Scripting
Published Apr 29, 2026
5.1
MEDIUMCVSS 4.0
EPSS 0.26%
Description
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. Attackers can create threads with script tags in the subject parameter to execute arbitrary JavaScript in the browsers of all users viewing the index page.
Affected products
-
- Version 17.0StatusaffectedConstraints-
- 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 Recent threads | n/a |
|
- 17.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (1)
References (3)
- https://community.mybb.com/mods.php?action=view&pid=191 product
- https://www.exploit-db.com/exploits/44420 exploitVDB Entry
- https://www.vulncheck.com/advisories/mybb-recent-threads-persistent-cross-site-scripting third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://community.mybb.com/mods.php?action=view&pid=191 | product | |
| https://www.exploit-db.com/exploits/44420 | exploitVDB Entry | |
| https://www.vulncheck.com/advisories/mybb-recent-threads-persistent-cross-site-scripting | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner VulnCheck
Published Apr 29, 2026
Updated May 24, 2026
Reserved Apr 29, 2026
Link CVE-2018-25309
CISA Vulnrichment
Updated Apr 30, 2026