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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2026-21861

baserCMS is a website development framework. Prior to version 5.2.3, baserCMS contains an OS command injection vulnerability in the core update functionality. An authenticated administrator can execute arbitrary OS commands on the server due to improper handling of user-controlled input that is directly passed to exec() without sufficient validation or escaping. This issue has been patched in version 5.2.3.

CVSS 9.1 · CriticalBuzz score 23.9

Buzz score

Why this CVE is surfacing

Buzz score total 23.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 13.9 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
13.9
3 evidence mentions in the snapshot
Diversity score
10.0
2 sources across 2 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
3 source links · newest first

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence
  • CVE-2026-30880

    baserCMS is a website development framework. Prior to version 5.2.3, baserCMS has an OS command injection vulnerability in the installer. This issue has been patched in version 5.…

    CVSS 9.2 · Critical
    3 mentions
  • CVE-2026-30877

    baserCMS is a website development framework. Prior to version 5.2.3, there is an OS command injection vulnerability in the update functionality. Due to this issue, an authenticate…

    CVSS 9.1 · Critical
    3 mentions
  • CVE-2023-51450

    baserCMS is a website development framework. Prior to version 5.0.9, there is an OS Command Injection vulnerability in the site search feature of baserCMS. Version 5.0.9 contains…

    CVSS 5.6 · Medium
  • CVE-2021-41243

    There is a Potential Zip Slip Vulnerability and OS Command Injection Vulnerability on the management system of baserCMS. Users with permissions to upload files may upload crafted…

    CVSS 9.1 · Critical
  • CVE-2021-20682

    baserCMS versions prior to 4.4.5 allows a remote attacker with an administrative privilege to execute arbitrary OS commands via unspecified vectors.

    CVSS 7.2 · High
  • CVE-2018-0569

    baserCMS (baserCMS 4.1.0.1 and earlier versions, baserCMS 3.0.15 and earlier versions) allows remote authenticated attackers to execute arbitrary OS commands via unspecified vecto…

    CVSS 8.8 · High