How severe is CVE-2012-1503?

CVE-2012-1503 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2012-1503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1503?

CVE-2012-1503 affects Sixapart Movable Type. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-1503?

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

When was CVE-2012-1503 published?

CVE-2012-1503 was published on 2014-08-29 and last updated on 2026-06-16.

CVE-2012-1503

CVE-2012-1503 is a medium-severity vulnerability in Sixapart Movable Type with a CVSS 2.0 base score of 4.3. 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 2.0 base score 4.3)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Sixapart Movable Type
Published: 2014-08-29
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in Six Apart (formerly Six Apart KK) Movable Type (MT) Pro 5.13 allows remote attackers to inject arbitrary web script or HTML via the comment section.

Frequently asked questions

What is CVE-2012-1503?: Cross-site scripting (XSS) vulnerability in Six Apart (formerly Six Apart KK) Movable Type (MT) Pro 5.13 allows remote attackers to inject arbitrary web script or HTML via the comment section.
How severe is CVE-2012-1503?: CVE-2012-1503 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2012-1503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-1503?: CVE-2012-1503 affects Sixapart Movable Type. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-1503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-1503 published?: CVE-2012-1503 was published on 2014-08-29 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:sixapart:movable_type:5.13:*:*:*:professional:*:*:*

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