What is CVE-2018-10678?

CVE-2018-10678 is a medium-severity vulnerability in Mybb, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2018-05-13.

How severe is CVE-2018-10678?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2018-10678 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Open Redirect in Mybb

CVE-2018-10678

MyBB 1.8.15, when accessed with Microsoft Edge, mishandles 'target="_blank" rel="noopener"' in A elements, which makes it easier for remote attackers to conduct redirection attacks.

Vulnerability class: Open Redirect

Published 2018-05-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: -0.000

Affected products

Mybb — versions 1.8.15

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

Public proof-of-concept exploits

References

www.securityfocus.com/bid/104187 (VDB Entry, Third Party Advisory, vdb-entry)
gist.github.com/MayurUdiniya/7aaa50b878d82b6aab6ed0b3e2b080bc (Third Party Advisory)

Frequently asked questions

What is CVE-2018-10678?: CVE-2018-10678 is a medium-severity vulnerability in Mybb, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2018-05-13.
How severe is CVE-2018-10678?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2018-10678 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.