CVE-2026-21788: medium-severity vulnerability in HCLSoftware Connections
HCL Connections is vulnerable to cross-site scripting (XSS)
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.4epss 0.2%
HCL Connections is vulnerable to a cross-site scripting attack where an attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user which leads to executing malicious script code. This may allow the attacker steal cookie-based authentication credentials and comprise user's account then launch other attacks.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Affected products
HCLSoftware · ConnectionsRelated CVEs — HCLSoftware Connections
In the same product, most dangerous first.
CVE-2025-52603LOWHCL Connections is vulnerable to information disclosureEPSS 0.3%CVE-2026-56538LOWHCL Connections is vulnerable to information disclosureEPSS 0.3%CVE-2026-56537LOWHCL Connections is vulnerable to information disclosureEPSS 0.3%CVE-2026-21827LOWHCL Connections is vulnerable to an information disclosure vulnerabilityEPSS 0.2%CVE-2025-62341LOWHCL Connections is vulnerable to server-side request forgery (SSRF)EPSS 0.2%CVE-2025-15619LOWHCL Connections is vulnerable to broken access controlEPSS 0.2%