CVE-2023-28873Public exploitNetwork attack vector

Stored script execution via unfiltered Markdown links

Published Dec 9, 2023 · Updated Aug 2, 2024

Stored cross-site scripting in Seafile 9.0.6 allows remote authenticated users to inject JavaScript through wiki and discussion pages. The Markdown editor preserves javascript: URIs supplied in an anchor element's href attribute instead of rejecting or neutralizing that scheme. A victim must visit the stored page and click the crafted link, which executes the attacker's script in the victim's browser context.

CVSS severity5.4
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Seafile 9.0.6 allows remote authenticated users to inject JavaScript through wiki and discussion pages. The Markdown editor preserves javascript: URIs supplied in an anchor element's href attribute instead of rejecting or neutralizing that scheme. A victim must visit the stored page and click the crafted link, which executes the attacker's script in the victim's browser context.

The record

CVE
CVE-2023-28873
Published
Dec 9, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 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')
T1204.001Malicious Link

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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