CVE-2024-3823Network attack vector

Stored script execution via forged settings update

Published May 15, 2024 · Updated Mar 27, 2025

Stored XSS in Base64 Encoder/Decoder 0.9.2 and earlier allows remote attackers to inject scripts through forged settings requests. The base64-encoderdecoder settings page accepts values without nonce validation or sanitization and later renders them without escaping. Exploitation requires an administrator to submit the forged request, after which the stored script executes when an affected page renders.

CVSS severity2.4
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Base64 Encoder/Decoder 0.9.2 and earlier allows remote attackers to inject scripts through forged settings requests. The base64-encoderdecoder settings page accepts values without nonce validation or sanitization and later renders them without escaping. Exploitation requires an administrator to submit the forged request, after which the stored script executes when an affected page renders.

The record

CVE
CVE-2024-3823
Published
May 15, 2024
Updated
Mar 27, 2025
Vendor
mranderson
Product
Base64 Encoder/Decoder
Classifications
CWE-352, CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 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=0 <=0.9.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

mranderson · Base64 Encoder/Decoderversion=0 <=0.9.2

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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