CVE-2026-53992Network attack vector

Victim-session script execution via unescaped date filters

Published Aug 5, 2026 · Updated Aug 5, 2026

Reflected XSS in ProjectSend r2029 allows remote attackers to execute scripts in an authenticated victim's browser via a crafted URL. thumbnails-regenerate.php places the start_date and end_date GET values into HTML value attributes without encoding quotation marks or other markup. Exploitation requires a victim with edit_settings permission to follow the URL, after which injected code runs in the application origin and can act with that victim's session.

CVSS severity5.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in ProjectSend r2029 allows remote attackers to execute scripts in an authenticated victim's browser via a crafted URL. thumbnails-regenerate.php places the start_date and end_date GET values into HTML value attributes without encoding quotation marks or other markup. Exploitation requires a victim with edit_settings permission to follow the URL, after which injected code runs in the application origin and can act with that victim's session.

The record

CVE
CVE-2026-53992
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
ProjectSend
Product
ProjectSend
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=b4ad95b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ProjectSend · ProjectSendversion=0 <=b4ad95b

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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