What’s Vulnerable › Vulnerabilities

CVE-2021-27581

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-05 · updated 2026-06-17
• Weakness: CWE-89

Description

The Blog module in Kentico CMS 5.5 R2 build 5.5.3996 allows SQL injection via the tagname parameter.

Affected products

• Kentico CMS: 5.5-r2

References

• https://gist.github.com/stasinopoulos/673ae3c31d703b4d67449f4d8888c686
• https://kontent.ai
• https://www.obrela.com/kentico-cms-critical-vulnerability/
• https://gist.github.com/stasinopoulos/673ae3c31d703b4d67449f4d8888c686
• https://kontent.ai
• https://www.obrela.com/kentico-cms-critical-vulnerability/

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