CVE-2026-21431

Name: CVE-2026-21431
Creator: NVD / NIST
Published: 2026-01-02T19:15:47.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2026-21431 is a low-severity vulnerability rated 2/10 on the CVSS scale. Emlog is an open source website building system. Version 2.5.23 has a stored cross-site scripting vulnerability in the `Resource media library ` function while publishing an article. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

Emlog is an open source website building system. Version 2.5.23 has a stored cross-site scripting vulnerability in the `Resource media library ` function while publishing an article. As of time of publication, no known patched versions are available.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

2/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.16%

5.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Emlog	Emlog	2.5.23

References

https://github.com/emlog/emlog/security/advisories/GHSA-9vc2-crhr-248xExploit, Vendor Advisory

Timeline

Published: Jan 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-21431?

How severe is CVE-2026-21431?

CVE-2026-21431 has a CVSS score of 2/10 (LOW severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2026-21431?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-21431?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST