CVE-2018-25309

Dragonexpert Recent Threads On Index cross-site scripting (XSS)

7.2 HIGHPublic exploitEPSS 0.26%

Published29 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeChanged

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Affected products

Dragonexpert Recent Threads On Index17.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2018-25309 being actively exploited?

CVE-2018-25309 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.26%.

How severe is CVE-2018-25309?

CVE-2018-25309 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 0.26% probability of exploitation.

Which products are affected by CVE-2018-25309?

Affected products include Dragonexpert Recent Threads On Index.

How do I fix CVE-2018-25309?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-25309 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.