How severe is CVE-2020-25877?

CVE-2020-25877 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-2020-25877 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25877?

CVE-2020-25877 affects Blackcat-cms Blackcat Cms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25877?

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

When was CVE-2020-25877 published?

CVE-2020-25877 was published on 2021-07-09 and last updated on 2026-06-17.

CVE-2020-25877

CVE-2020-25877 is a medium-severity vulnerability in Blackcat-cms Blackcat Cms 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% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Blackcat-cms Blackcat Cms
Published: 2021-07-09
Last modified: 2026-06-17

Description

A stored cross site scripting (XSS) vulnerability in the 'Add Page' feature of BlackCat CMS 1.3.6 allows authenticated attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the 'Title' parameter.

Frequently asked questions

What is CVE-2020-25877?: A stored cross site scripting (XSS) vulnerability in the 'Add Page' feature of BlackCat CMS 1.3.6 allows authenticated attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the 'Title' parameter.
How severe is CVE-2020-25877?: CVE-2020-25877 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-2020-25877 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25877?: CVE-2020-25877 affects Blackcat-cms Blackcat Cms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25877?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-25877 published?: CVE-2020-25877 was published on 2021-07-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:blackcat-cms:blackcat_cms:1.3.6:*:*:*:*:*:*:*

More vulnerabilities in Blackcat-cms Blackcat Cms

CVE-2020-25453 — High (CVSS 8.8): An issue was discovered in BlackCat CMS before 1.4. There is a CSRF vulnerability (bypass csrf_token) that allows…
CVE-2017-14399 — High (CVSS 8.8): In BlackCat CMS 1.2.2, unrestricted file upload is possible in backend\media\ajax_rename.php via the extension…
CVE-2017-14050 — High (CVSS 8.8): In BlackCat CMS 1.2, backend/addons/install.php allows remote authenticated users to execute arbitrary PHP code via a…
CVE-2017-14048 — High (CVSS 8.8): BlackCat CMS 1.2 allows remote authenticated users to inject arbitrary PHP code into info.php via a crafted…
CVE-2015-5079 — High (CVSS 7.5): Directory traversal vulnerability in widgets/logs.php in BlackCat CMS before 1.1.2 allows remote attackers to read…
CVE-2023-53892 — High (CVSS 7.2): Blackcat CMS 1.4 contains a remote code execution vulnerability that allows authenticated administrators to upload…

All CVEs affecting Blackcat-cms Blackcat Cms →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →