CVE-2025-3840

Reflected XSS via login action parameter

Published Apr 21, 2025 · Updated Apr 21, 2025

Cross-site scripting in Saviynt OVA based Connect allows adjacent attackers to execute script through the login form action parameter. The installer login form incorporates the attacker-controlled action parameter into generated HTML without neutralizing script content. The flaw is confined to end-of-life Linux OVA deployments, requires passive user interaction and attack-specific conditions, and permits script execution in the affected browser context.

CVSS severity2.1
Low
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Saviynt OVA based Connect allows adjacent attackers to execute script through the login form action parameter. The installer login form incorporates the attacker-controlled action parameter into generated HTML without neutralizing script content. The flaw is confined to end-of-life Linux OVA deployments, requires passive user interaction and attack-specific conditions, and permits script execution in the affected browser context.

The record

CVE
CVE-2025-3840
Published
Apr 21, 2025
Updated
Apr 21, 2025
Vendor
Saviynt
Product
OVA based Connect
Classifications
CWE-79, T1204
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record 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=AlmaLinux-8.x_SC2.0-Client-2.0
  2. Affected versionversion=AlmaLinux-8.x_SC2.0-Client-3.0
  3. Affected versionversion=CentOS-7.x_SC2.0-Client-2.0
  4. Affected versionversion=CentOS-7.x_SC2.0-Client-3.0
  5. Affected versionversion=RHEL-8.x_SC2.0-Client-2.0
  6. Affected versionversion=RHEL-8.x_SC2.0-Client-3.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Saviynt · OVA based Connectversion=AlmaLinux-8.x_SC2.0-Client-2.0; version=AlmaLinux-8.x_SC2.0-Client-3.0; version=CentOS-7.x_SC2.0-Client-2.0; version=CentOS-7.x_SC2.0-Client-3.0; version=RHEL-8.x_SC2.0-Client-2.0; version=RHEL-8.x_SC2.0-Client-3.0

Published CVSS scores

2.1SaviyntCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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