How severe is CVE-2020-15516?

CVE-2020-15516 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-15516 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15516?

CVE-2020-15516 affects Mm Forum Project Mm Forum. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-15516?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-15516 published?

CVE-2020-15516 was published on 2020-07-07 and last updated on 2026-06-17.

CVE-2020-15516

CVE-2020-15516 is a medium-severity vulnerability in Mm Forum Project Mm Forum with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 5.8
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mm Forum Project Mm Forum
Published: 2020-07-07
Last modified: 2026-06-17

Description

The mm_forum extension through 1.9.5 for TYPO3 allows XSS that can be exploited via CSRF.

Frequently asked questions

What is CVE-2020-15516?: The mm_forum extension through 1.9.5 for TYPO3 allows XSS that can be exploited via CSRF.
How severe is CVE-2020-15516?: CVE-2020-15516 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-15516 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15516?: CVE-2020-15516 affects Mm Forum Project Mm Forum. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-15516?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-15516 published?: CVE-2020-15516 was published on 2020-07-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mm_forum_project:mm_forum:*:*:*:*:*:typo3:*:*

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