CVE-2022-4959Public exploitNetwork attack vector

Stored XSS via unfiltered nickname rendering

Published Jan 11, 2024 · Updated Oct 25, 2024

Stored XSS in the nickname handler of qkmc-rk RedBBS 1.0 allows remote authenticated users to execute scripts in another user's browser. The application stores an unfiltered registration nickname and inserts it into rendered posts without neutralizing script markup. An attacker needs an account to register the crafted nickname, and another user must browse a post displaying it, enabling script execution in that user's web context.

CVSS severity6.1
Medium
EPSS probability0.44%
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 the nickname handler of qkmc-rk RedBBS 1.0 allows remote authenticated users to execute scripts in another user's browser. The application stores an unfiltered registration nickname and inserts it into rendered posts without neutralizing script markup. An attacker needs an account to register the crafted nickname, and another user must browse a post displaying it, enabling script execution in that user's web context.

The record

CVE
CVE-2022-4959
Published
Jan 11, 2024
Updated
Oct 25, 2024
Vendor
qkmc-rk
Product
RedBBS
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

qkmc-rk · RedBBSversion=1.0

Published CVSS scores

3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
6.1NIST NVDCVSS: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.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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