Is CVE-2018-1000503 in the CISA KEV catalog?

No. CVE-2018-1000503 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-1000503?

CVE-2018-1000503 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2018-1000503?

CVE-2018-1000503 has an EPSS score of 0.62% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000503?

Upgrade mybb to 1.8.15 or later.

CVE & CISA-KEV Catalog

CVE-2018-1000503

MEDIUM

4.3

CVSS v3

NVD

Description

MyBB Group MyBB contains a Incorrect Access Control vulnerability in Private forums that can result in Users can view posts from private forums without having the password. This attack appear to be exploitable via Subscribe to a forum through IDOR. This vulnerability appears to have been fixed in 1.8.15.

CWE-269Improper Privilege Management

How to fix

Remediation Available

mybbNVD

Affected:< 1.8.15Fixed in:1.8.15CVE-2018-1000503derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.62%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Vendor Advisory1

blog.mybb.com

Third-Party Advisory1

batterystapl.es

Related Vulnerabilities

Other CWE-269 (Improper Privilege Management) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-12635	Critical	9.8	100%	-	Fix
CVE-2022-24637	Critical	9.8	99%	-	Fix
CVE-2017-5689	Critical	9.8	92%	KEV	Fix
CVE-2020-3243	Critical	9.8	88%	-	-
CVE-2024-21888	High	8.8	87%	-	-
CVE-2022-0441	Critical	9.8	85%	-	Fix

Embed a live status badge for CVE-2018-1000503

Markdown

[![CVE-2018-1000503](https://tridentstack.com/cve/badge/CVE-2018-1000503.svg)](https://tridentstack.com/cve/CVE-2018-1000503)

HTML

<a href="https://tridentstack.com/cve/CVE-2018-1000503"><img src="https://tridentstack.com/cve/badge/CVE-2018-1000503.svg" alt="CVE-2018-1000503"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.