How severe is CVE-2026-53907?

CVE-2026-53907 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-2026-53907 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53907?

CVE-2026-53907 affects Mycomplianceoffice. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-53907?

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

When was CVE-2026-53907 published?

CVE-2026-53907 was published on 2026-07-01 and last updated on 2026-07-06.

CVE-2026-53907

CVE-2026-53907 is a medium-severity vulnerability in Mycomplianceoffice 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 v4: 4.8
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mycomplianceoffice
Published: 2026-07-01
Last modified: 2026-07-06

Description

MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

Frequently asked questions

What is CVE-2026-53907?: MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.
How severe is CVE-2026-53907?: CVE-2026-53907 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-2026-53907 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53907?: CVE-2026-53907 affects Mycomplianceoffice. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-53907?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-53907 published?: CVE-2026-53907 was published on 2026-07-01 and last updated on 2026-07-06.

References

Affected products (1)

cpe:2.3:a:mycomplianceoffice:mycomplianceoffice:25.3.3.1:*:*:*:*:*:*:*

More vulnerabilities in Mycomplianceoffice

CVE-2026-53906 — High (CVSS 8.2): MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and…
CVE-2026-53903 — High (CVSS 8.1): MCO is vulnerable to an Insecure Direct Object Reference (IDOR) vulnerability in the…
CVE-2026-53905 — High (CVSS 7.1): MCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/admin-view-hierarchy/get-acl-tree…
CVE-2026-53909 — Medium (CVSS 6.5): MCO does not correctly validate types of uploaded files. File upload validation functionality relies only on…
CVE-2026-53902 — Medium (CVSS 6.5): MCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/profile-sections/group-membership…
CVE-2026-53908 — Medium (CVSS 4.3): MCO is vulnerable to User Enumeration through authentication-related functionalities. The application returns…

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