VulnerabilityModified
CVE-2021-27581
The Blog module in Kentico CMS 5.5 R2 build 5.5.3996 allows SQL injection via the tagname parameter.
CRITICAL 9.8EPSS 1.69%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.69%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The Blog module in Kentico CMS 5.5 R2 build 5.5.3996 allows SQL injection via the tagname parameter.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.69% probability · 77th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-89
- Affected
- kentico/kentico cms
- Source
- cve@mitre.org
EPSS 1.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://gist.github.com/stasinopoulos/673ae3c31d703b4d67449f4d8888c686Third Party Advisory
- https://kontent.aiProduct, Vendor Advisory
- https://www.obrela.com/kentico-cms-critical-vulnerability/Third Party Advisory
- https://gist.github.com/stasinopoulos/673ae3c31d703b4d67449f4d8888c686Third Party Advisory
- https://kontent.aiProduct, Vendor Advisory
- https://www.obrela.com/kentico-cms-critical-vulnerability/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.