CVE-2022-4740Public exploitNetwork attack vector

Browser script execution via unfiltered watermark parameters

Published Dec 25, 2022 · Updated Aug 3, 2024

Cross-site scripting in kekingcn kkFileView allows remote attackers to execute script in a viewer's browser via /picturesPreview. AttributeSetFilter#setWatermarkAttribute accepts unfiltered watermark parameters and places them in commonHeader.ftl, which picture.ftl renders for /picturesPreview. No authentication is required, but a user must open the crafted preview response; code runs only in that user's browser context.

CVSS severity6.1
Medium
EPSS probability0.55%
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 kekingcn kkFileView allows remote attackers to execute script in a viewer's browser via /picturesPreview. AttributeSetFilter#setWatermarkAttribute accepts unfiltered watermark parameters and places them in commonHeader.ftl, which picture.ftl renders for /picturesPreview. No authentication is required, but a user must open the crafted preview response; code runs only in that user's browser context.

The record

CVE
CVE-2022-4740
Published
Dec 25, 2022
Updated
Aug 3, 2024
Vendor
kekingcn
Product
kkFileView
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

kekingcn · kkFileViewversion=n/a

Published CVSS scores

6.1NVDCVSS: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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