CVE-2025-5886Public exploitNetwork attack vector

Stored script execution via unsanitized Markdown excerpts

Published Jun 9, 2025 · Updated Jun 10, 2025

Stored cross-site scripting in emlog 2.5.0 through 2.5.7 allows remote authenticated users to execute script in a reader's browser. article_save.php passes untrusted Markdown through Parsedown and stores the resulting HTML excerpt without sanitizing it before later rendering it unescaped. Article-editing access and a reader who opens the affected content are required; successful exploitation runs attacker-controlled script in that reader's emlog origin.

CVSS severity4.1
Medium
EPSS probability0.40%
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 emlog 2.5.0 through 2.5.7 allows remote authenticated users to execute script in a reader's browser. article_save.php passes untrusted Markdown through Parsedown and stores the resulting HTML excerpt without sanitizing it before later rendering it unescaped. Article-editing access and a reader who opens the affected content are required; successful exploitation runs attacker-controlled script in that reader's emlog origin.

The record

CVE
CVE-2025-5886
Published
Jun 9, 2025
Updated
Jun 10, 2025
Vendor
emlog
Product
emlog
Classifications
CWE-94, CWE-79, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2025Record 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=2.5.0
  2. Affected versionversion=2.5.1
  3. Affected versionversion=2.5.2
  4. Affected versionversion=2.5.3
  5. Affected versionversion=2.5.4
  6. Affected versionversion=2.5.5
  7. Affected versionversion=2.5.6
  8. Affected versionversion=2.5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

emlog · emlogversion=2.5.0; version=2.5.1; version=2.5.2; version=2.5.3; version=2.5.4; version=2.5.5; version=2.5.6; version=2.5.7

Published CVSS scores

4.0VulDBAV:N/AC:L/Au:S/C:N/I:P/A:N
2.0VulDBCVSS: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
4.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
3.5VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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-94Improper Control of Generation of Code ('Code Injection')
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

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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