CVE-2018-25309

5.1 mediumEPSS 0.3%

Medium (5.1) in dragonexpert recent threads on index. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

5.1 medium

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

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-04-29
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

dragonexpert:recent_threads_on_index

References

https://community.mybb.com/mods.php?action=view&pid=191
https://www.exploit-db.com/exploits/44420
https://www.vulncheck.com/advisories/mybb-recent-threads-persistent-cross-site-scripting

Check your stack JSON