What is CVE-2020-15513?

CVE-2020-15513 is a medium-severity vulnerability in Mittwald TYPO3 Forum, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2020-07-07.

How severe is CVE-2020-15513?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Mittwald TYPO3 Forum

CVE-2020-15513

The typo3_forum extension before 1.2.1 for TYPO3 has Incorrect Access Control.

Vulnerability class: Broken Access Control

Published 2020-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Mittwald TYPO3 Forum

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

typo3.org/help/security-advisories (Third Party Advisory)
typo3.org/security/advisory/typo3-ext-sa-2020-010 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-15513?: CVE-2020-15513 is a medium-severity vulnerability in Mittwald TYPO3 Forum, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2020-07-07.
How severe is CVE-2020-15513?: Medium severity. CVSS v3 base score is 5.3 out of 10.