CVE-2026-6283: Stored XSS in DivvyDrive 4.8.2.23–4.8.3.0

Technical summary

CVE-2026-6283 is a stored XSS vulnerability in DivvyDrive arising from improper neutralization of user input during web page generation (CWE-79). The flaw requires authenticated access and user interaction to trigger, as reflected in the CVSS vector AV:N/AC:L/PR:L/UI:R. An authenticated attacker can inject JavaScript payloads that persist in the application's data store. When subsequent users access the affected page, the payload executes within their browser context, potentially under the same security origin as the application. The vulnerability does not require special access controls to exploit once an attacker has valid credentials.

Business impact

Stored XSS in DivvyDrive poses risks to collaborative workflow integrity and user trust. Attackers with valid credentials can inject malicious content that affects all users accessing compromised shared files or documents. Potential impacts include session hijacking, credential theft, malware distribution, or unauthorized access to sensitive information shared within DivvyDrive. Organizations relying on DivvyDrive for secure document collaboration should prioritize remediation to prevent insider threats and credential compromise affecting downstream systems.

Affected systems

DivvyDrive versions 4.8.2.23 through 4.8.3.0 are affected. Users running version 4.8.3.1 or later are not vulnerable. Organizations should verify their deployed version against this range to assess exposure.

Exploitability

The vulnerability requires an authenticated user account, reducing the attack surface compared to unauthenticated XSS. However, once an attacker gains or is granted valid credentials—whether through compromise, insider access, or vendor-supplied trial accounts—exploitation is straightforward and requires no special network conditions (AV:N) or complex attack setup (AC:L). The requirement for user interaction (UI:R) means the injected payload must be viewed by a target user to execute, but this is typical in collaborative environments where users regularly review shared content.

Remediation

Upgrade DivvyDrive to version 4.8.3.1 or later. Verify the patch version against the vendor's advisory before deployment. Organizations unable to upgrade immediately should restrict authenticated access to DivvyDrive accounts, audit user permissions, and monitor for suspicious content injection or unusual script activity in shared documents.

Patch guidance

Apply DivvyDrive version 4.8.3.1 or newer as a priority patch. Before updating production environments, test the patch in a staging deployment to confirm compatibility with your file sharing workflows and any customizations. Coordinate the update with users to minimize disruption, and confirm successful patching across all instances. Verify against the official DivvyDrive advisory for any prerequisites or post-update configuration steps.

Detection guidance

Monitor for anomalous JavaScript or HTML markup in user-generated content stored within DivvyDrive, particularly in file descriptions, comments, or shared document fields. Review authentication logs for unusual login patterns or privilege escalations that might indicate compromised credentials. Inspect browser console errors or network requests from DivvyDrive pages for unexpected script execution. Web application firewalls should flag attempts to inject script tags or event handlers into collaborative platform inputs.

Why prioritize this

Although the CVSS score of 5.4 indicates medium severity, the stored nature of this XSS and its presence in a collaboration platform amplify risk. Stored payloads persist and affect multiple users over time, increasing the likelihood of undetected compromise. Authenticated users often possess higher trust levels and may be less suspicious of injected content, raising the odds of successful exploitation. Organizations using DivvyDrive for sensitive document sharing should prioritize this patch above the numeric severity score suggests.

Risk score, explained

The CVSS 3.1 score of 5.4 (MEDIUM) reflects the requirement for authenticated access (PR:L) and user interaction (UI:R), which prevent remote unauthenticated mass exploitation. However, the network-accessible attack vector (AV:N), low attack complexity (AC:L), and ability to impact confidentiality and integrity across security boundaries (S:C) warrant careful attention in multi-user environments. The score does not fully capture the organizational risk of insider threats or compromised credentials leading to persistent data corruption.

Frequently asked questions