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CVE-2026-53992 ProjectSend CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T16:16:57.920Z and has not been modified since then. The ProjectSend r2029 version contains a reflected cross-site scripting vulnerability in thumbnails-regenerate.php. The vulnerability allows remote attackers to inject arbitrary HTML and JavaScript by supplying unsanitized values in the start_date and end_date GET parameters, which are echoed unescaped into HTML attribute values. An attacker can craft a malicious URL that, when followed by an authenticated victim with edit_settings permissions, executes injected scripts in the application origin to steal session cookies or perform unauthorized actions. Administrators and users of ProjectSend r2029, especially those with edit_settings permissions, should be aware of this vulnerability and take necessary defensive actions to prevent exploitation. Medium-priority defensive actions are required to address the reflected cross-site scripting vulnerability in ProjectSend r2029.

Vendor
ProjectSend
Product
Unknown
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-05
Original CVE updated
2026-08-05
Advisory published
2026-08-05
Advisory updated
2026-08-05

Who should care

Administrators and users of ProjectSend r2029, especially those with edit_settings permissions, should be aware of this vulnerability and take necessary defensive actions to prevent exploitation.

Technical summary

The ProjectSend r2029 version contains a reflected cross-site scripting vulnerability in thumbnails-regenerate.php. The vulnerability allows remote attackers to inject arbitrary HTML and JavaScript by supplying unsanitized values in the start_date and end_date GET parameters, which are echoed unescaped into HTML attribute values. An attacker can craft a malicious URL that, when followed by an authenticated victim with edit_settings permissions, executes injected scripts in the application origin to steal session cookies or perform unauthorized actions.

Defensive priority

Medium-priority defensive actions are required to address the reflected cross-site scripting vulnerability in ProjectSend r2029.

Recommended defensive actions

  • Inventory and verify ProjectSend installations to identify potential exposure.
  • Implement input validation and output encoding for user-supplied data in thumbnails-regenerate.php.
  • Restrict access to the thumbnails-regenerate.php script to only authorized users.
  • Monitor for suspicious activity and implement compensating controls as needed.
  • Apply vendor patches or updates when available.

Evidence notes

The CVE description indicates a reflected cross-site scripting vulnerability in ProjectSend r2029, specifically in thumbnails-regenerate.php. The vulnerability allows remote attackers to inject arbitrary HTML and JavaScript via unsanitized values in the start_date and end_date GET parameters. However, details about the vendor's response, affected scope, and potential impact are limited.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53992 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53992

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53992 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53992

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.