CVE-2026-27742Public exploitNetwork attack vector

Browser script execution via unsanitized post content

Published Feb 23, 2026 · Updated Feb 23, 2026

Stored XSS in Bludit 3.16.2 and earlier allows remote authenticated users to execute JavaScript in visitors' browsers through post content. The post editor relies on client-side sanitation, while the server stores the content parameter and later renders it without equivalent sanitation or output encoding. An authenticated account must create the post and another user must view it, exposing that viewer's session and permitting actions within that viewer's privileges.

CVSS severity5.1
Medium
EPSS probability0.14%
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 Bludit 3.16.2 and earlier allows remote authenticated users to execute JavaScript in visitors' browsers through post content. The post editor relies on client-side sanitation, while the server stores the content parameter and later renders it without equivalent sanitation or output encoding. An authenticated account must create the post and another user must view it, exposing that viewer's session and permitting actions within that viewer's privileges.

The record

CVE
CVE-2026-27742
Published
Feb 23, 2026
Updated
Feb 23, 2026
Vendor
Bludit
Product
Bludit
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 2026Record 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 <=3.16.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bludit · Bluditversion=0 <=3.16.2

Published CVSS scores

5.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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
Privilegesauthenticated
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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