CVE-2026-2622Public exploitNetwork attack vector

Stored script execution via unneutralized article titles

Published Feb 17, 2026 · Updated Feb 17, 2026

Stored cross-site scripting in Blossom 1.17.0 through 1.17.1 allows remote authenticated users to run script via an article title. The /article/add method in ArticleController copies the request into an ArticleEntity and stores it without neutralizing title markup. An authenticated account and subsequent rendering by a browser are required, exposing the viewing user's Blossom session to script-controlled actions.

CVSS severity5.4
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Stored cross-site scripting in Blossom 1.17.0 through 1.17.1 allows remote authenticated users to run script via an article title. The /article/add method in ArticleController copies the request into an ArticleEntity and stores it without neutralizing title markup. An authenticated account and subsequent rendering by a browser are required, exposing the viewing user's Blossom session to script-controlled actions.

The record

CVE
CVE-2026-2622
Published
Feb 17, 2026
Updated
Feb 17, 2026
Vendor
blossom-editor
Product
Blossom
Classifications
CWE-94, CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.17.0
  2. Affected versionversion=1.17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

blossom-editor · Blossomversion=1.17.0; version=1.17.1

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
2.0VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDB CNAAV:N/AC:L/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
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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