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CVE-2026-33657: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

🗓️ 13 Apr 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com

Stored HTML injection in EspoCRM 9.3.3 and below via stream activity notes for phishing.

Related
Refs
ReporterTitlePublishedViews
Family
githubexploit
GithubExploit
Exploit for Basic XSS in Espocrm
11 May 202620:39
–githubexploit
attackerkb
attackerkb
CVE-2026-33657
13 Apr 202619:41
–attackerkb
circl
Circl
CVE-2026-33657
12 May 202603:00
–circl
cnnvd
CNNVD
EspoCRM 安全漏洞
13 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-33657
13 Apr 202619:41
–cve
cvelist
Cvelist
CVE-2026-33657 EspoCRM: Stored HTML injection in email notifications about stream notes via unescaped post field
13 Apr 202619:41
–cvelist
euvd
EUVD
EUVD-2026-22081
13 Apr 202619:41
–euvd
kitploit
Kitploit
CVE-2026-33657
24 Sep 202616:11
–kitploit
nvd
NVD
CVE-2026-33657
13 Apr 202620:16
–nvd
ptsecurity
Positive Technologies
PT-2026-32509
13 Apr 202600:00
–ptsecurity
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22 Apr 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.14.6 - 5.4
EPSS0.00248
SSVC
0