CVE-2023-33336Public exploitNetwork attack vector

Reflected XSS via unneutralized double-quote input

Published Jun 30, 2023 · Updated Nov 27, 2024

Reflected XSS in Sophos Web Appliance 4.3.9.1 allows remote authenticated users to execute script in a victim's browser via crafted double quotes. A web response reflects attacker-supplied double-quote input without context-appropriate neutralization, letting injected markup escape its intended context. High-privilege access and a victim's interaction are required, and the documented impact is limited to browser-context confidentiality and integrity.

CVSS severity4.8
Medium
EPSS probability0.58%
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 Sophos Web Appliance 4.3.9.1 allows remote authenticated users to execute script in a victim's browser via crafted double quotes. A web response reflects attacker-supplied double-quote input without context-appropriate neutralization, letting injected markup escape its intended context. High-privilege access and a victim's interaction are required, and the documented impact is limited to browser-context confidentiality and integrity.

The record

CVE
CVE-2023-33336
Published
Jun 30, 2023
Updated
Nov 27, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

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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