CVE-2021-21319Network attack vector

Browser script execution via unescaped form values

Published Oct 25, 2021 · Updated Aug 3, 2024

Cross-site scripting in Galette before 0.9.5 allows remote attackers to execute JavaScript in another person's browser. Member names, company data, dynamic-field labels, and login values reach templates or controller output without HTML escaping. Stored payloads require self-subscription to be enabled and a victim to view affected member data; reflected payloads require user interaction on a login or password-retrieval page.

CVSS severity6.8
Medium
EPSS probability0.89%
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 Galette before 0.9.5 allows remote attackers to execute JavaScript in another person's browser. Member names, company data, dynamic-field labels, and login values reach templates or controller output without HTML escaping. Stored payloads require self-subscription to be enabled and a victim to view affected member data; reflected payloads require user interaction on a login or password-retrieval page.

The record

CVE
CVE-2021-21319
Published
Oct 25, 2021
Updated
Aug 3, 2024
Vendor
Galette
Product
Galette
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 25, 2021CVE 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=< 0.9.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Galette · Galetteversion=< 0.9.5

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
3.5NIST NVDAV:N/AC:M/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

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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