CVE-2026-2737Network attack vector

Administrator-session actions via undisclosed cross-site scripting

Published Apr 2, 2026 · Updated Apr 2, 2026

Cross-site scripting in Flowmon 12 before 12.5.8 and Flowmon 13 before 13.0.6 allows remote authenticated users to act in an administrator's session. Progress identifies CWE-79 but has not published the affected parameter, rendering context, or improper neutralization operation. Exploitation requires low-privileged access and an administrator to follow a malicious link, after which actions execute within the administrator's authenticated web session.

CVSS severity8.5
High
EPSS probability0.20%
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 Flowmon 12 before 12.5.8 and Flowmon 13 before 13.0.6 allows remote authenticated users to act in an administrator's session. Progress identifies CWE-79 but has not published the affected parameter, rendering context, or improper neutralization operation. Exploitation requires low-privileged access and an administrator to follow a malicious link, after which actions execute within the administrator's authenticated web session.

The record

CVE
CVE-2026-2737
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Progress Software Corporation
Product
Flowmon
Classifications
CWE-79, CAPEC-63, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 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=Flowmon 12 versions prior to 12.5.8
  2. Affected versionversion=Flowmon 13 versions prior to 13.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Progress Software Corporation · Flowmonversion=Flowmon 12 versions prior to 12.5.8; version=Flowmon 13 versions prior to 13.0.6

Published CVSS scores

6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
8.5Progress Software CorporationCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:L/SI:L/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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1204.001User Execution: Malicious Link

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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