CVE-2026-21429Public exploitNetwork attack vector

Authenticated article modification via replayed save requests

Published Jan 2, 2026 · Updated Jan 2, 2026

Authorization bypass in emlog 2.5.23 allows remote authenticated users to modify published articles via replayed save requests. The article update path accepts a previously captured save request without enforcing the administrator's post-publication edit restriction. A registered user must own the article and retain a valid request; the demonstrated consequence is unauthorized modification of that article.

CVSS severity4.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in emlog 2.5.23 allows remote authenticated users to modify published articles via replayed save requests. The article update path accepts a previously captured save request without enforcing the administrator's post-publication edit restriction. A registered user must own the article and retain a valid request; the demonstrated consequence is unauthorized modification of that article.

The record

CVE
CVE-2026-21429
Published
Jan 2, 2026
Updated
Jan 2, 2026
Vendor
emlog
Product
emlog
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 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== 2.5.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

emlog · emlogversion== 2.5.23

Published CVSS scores

2.0GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 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-862Missing Authorization
T1565.001Stored Data Manipulation

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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