How severe is CVE-2020-20781?

CVE-2020-20781 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-2020-20781 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-20781?

CVE-2020-20781 affects Ucms Project Ucms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-20781?

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

When was CVE-2020-20781 published?

CVE-2020-20781 was published on 2021-09-29 and last updated on 2026-06-17.

CVE-2020-20781

CVE-2020-20781 is a medium-severity vulnerability in Ucms Project Ucms 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% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ucms Project Ucms
Published: 2021-09-29
Last modified: 2026-06-17

Description

A stored cross-site scripting (XSS) vulnerability in /ucms/index.php?do=list_edit of UCMS 1.4.7 allows attackers to execute arbitrary web scripts or HTML via a crafted payload in the title, key words, description or content text fields.

Frequently asked questions

What is CVE-2020-20781?: A stored cross-site scripting (XSS) vulnerability in /ucms/index.php?do=list_edit of UCMS 1.4.7 allows attackers to execute arbitrary web scripts or HTML via a crafted payload in the title, key words, description or content text fields.
How severe is CVE-2020-20781?: CVE-2020-20781 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-2020-20781 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-20781?: CVE-2020-20781 affects Ucms Project Ucms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-20781?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-20781 published?: CVE-2020-20781 was published on 2021-09-29 and last updated on 2026-06-17.

References

https://github.com/forget-code/ucms/issues/1

Affected products (1)

cpe:2.3:a:ucms_project:ucms:1.4.7:*:*:*:*:*:*:*

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