How severe is CVE-2021-45787?

CVE-2021-45787 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-2021-45787 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45787?

CVE-2021-45787 primarily affects Maccms. In total, 90 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-45787?

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

When was CVE-2021-45787 published?

CVE-2021-45787 was published on 2022-03-16 and last updated on 2026-06-17.

CVE-2021-45787

CVE-2021-45787 is a medium-severity vulnerability in Maccms 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: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Maccms
Published: 2022-03-16
Last modified: 2026-06-17

Description

There is a stored Cross Site Scripting (XSS) vulnerability in maccms v10 through adding videos. XSS code can be inserted at parameter positions including name and remarks.

Frequently asked questions

What is CVE-2021-45787?: There is a stored Cross Site Scripting (XSS) vulnerability in maccms v10 through adding videos. XSS code can be inserted at parameter positions including name and remarks.
How severe is CVE-2021-45787?: CVE-2021-45787 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-2021-45787 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45787?: CVE-2021-45787 primarily affects Maccms. In total, 90 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-45787?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45787 published?: CVE-2021-45787 was published on 2022-03-16 and last updated on 2026-06-17.

References

https://github.com/magicblack/maccms10/issues/746

Affected products (90)

cpe:2.3:a:maccms:maccms:10.0:-:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.03.15:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.03.21:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.04.02:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.01:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.02.1005:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.03.0000:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.04.1320:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.07.1213:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.08.2020:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.09.1320:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.11.2300:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.15.1403:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.17.1050:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.22.1338:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.05.30.1007:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.06.04.1510:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.06.08.1339:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.06.12.1430:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.06.15.0910:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.06.29.1425:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.07.29.1010:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.08.14.0955:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.08.24.1355:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.08.25.1120:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.09.03.0920:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.09.14.0850:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.09.28.0950:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.10.09.1333:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.10.13.1025:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.10.22.1200:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.10.31.1340:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.11.18.0920:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.12.05.0950:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2018.12.13.2151:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2019.00.00.1001:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2019.00.00.1002:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2019.00.00.1003:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2019.00.00.1004:*:*:*:*:*:*
cpe:2.3:a:maccms:maccms:10.0:2019.00.00.1005:*:*:*:*:*:*

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