CVE-2023-4594Network attack vector

Stored XSS via unsanitized MailAdmin_dll.htm parameters

Published Nov 23, 2023 · Updated Nov 21, 2024

Stored cross-site scripting in BVRP Software SLmail 5.5.0.4433 allows attackers to store JavaScript through network requests. MailAdmin_dll.htm accepts multiple GET and POST parameters without neutralizing script content before it is persisted and later rendered. Exploitation requires a network-reachable administrative interface and a user to load the affected content, enabling limited cross-site disclosure or actions without a reported availability effect.

CVSS severity6.1
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in BVRP Software SLmail 5.5.0.4433 allows attackers to store JavaScript through network requests. MailAdmin_dll.htm accepts multiple GET and POST parameters without neutralizing script content before it is persisted and later rendered. Exploitation requires a network-reachable administrative interface and a user to load the affected content, enabling limited cross-site disclosure or actions without a reported availability effect.

The record

CVE
CVE-2023-4594
Published
Nov 23, 2023
Updated
Nov 21, 2024
Vendor
BVRP Software
Product
SLmail
Classifications
CWE-79, CAPEC-592, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 21, 2024Record 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=5.5.0.4433

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BVRP Software · SLmailversion=5.5.0.4433

Published CVSS scores

6.1INCIBECVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
CAPEC-592CAPEC-592 Stored XSS
T1189Drive-by Compromise

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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