How severe is CVE-2020-5669?

CVE-2020-5669 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-5669 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5669?

CVE-2020-5669 primarily affects Sixapart Movable Type. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5669?

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

When was CVE-2020-5669 published?

CVE-2020-5669 was published on 2021-10-26 and last updated on 2026-06-17.

CVE-2020-5669

CVE-2020-5669 is a medium-severity vulnerability in Sixapart Movable Type 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: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sixapart Movable Type
Published: 2021-10-26
Last modified: 2026-06-17

Description

Cross-site scripting vulnerability in Movable Type Movable Type Premium 1.37 and earlier and Movable Type Premium Advanced 1.37 and earlier allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.

Frequently asked questions

What is CVE-2020-5669?: Cross-site scripting vulnerability in Movable Type Movable Type Premium 1.37 and earlier and Movable Type Premium Advanced 1.37 and earlier allows a remote authenticated attacker to inject an arbitrary script via unspecified vectors.
How severe is CVE-2020-5669?: CVE-2020-5669 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-5669 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5669?: CVE-2020-5669 primarily affects Sixapart Movable Type. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5669?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-5669 published?: CVE-2020-5669 was published on 2021-10-26 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium:*:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium_advanced:*:*:*

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