An authentication vulnerability was discovered in Jira Service Management Server and Data Center which allows an attacker to impersonate another user and gain access to a Jira Service Management instance under certain circumstances_._ With write access to a User Directory and outgoing email enabled on a Jira Service Management instance, an attacker could gain access to signup tokens sent to users with accounts that have never been logged into. Access to these tokens can be obtained in two cases: * If the attacker is included on Jira issues or requests with these users, or * If the attacker is forwarded or otherwise gains access to emails containing a “View Request” link from these users. Bot accounts are particularly susceptible to this scenario. On instances with single sign-on, external customer accounts can be affected in projects where anyone can create their own account.
Conclusion & alert: CVE-2023-22501 is rated High Risk (75.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 15.98%, 96th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +13.62% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 2.36% | 15.98% | +13.62% |
| 2 | 2026-02-06 | 2.71% | 2.36% | -0.35% |
| 3 | 2026-02-04 | — | 2.71% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.1 | 3.1 | CRITICAL |
|
3.9 | 5.2 | [email protected] |
| 9.4 | 3.0 | CRITICAL |
|
3.9 | 5.5 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| atlassian | jira_service_management | >= 5.3.0, < 5.3.3 | cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:data_center:*:*:* |
| atlassian | jira_service_management | >= 5.3.0, < 5.3.3 | cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:server:*:*:* |
| atlassian | jira_service_management | >= 5.4.0, < 5.4.2 | cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:data_center:*:*:* |
| atlassian | jira_service_management | >= 5.4.0, < 5.4.2 | cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:server:*:*:* |
| atlassian | jira_service_management | 5.5.0 | cpe:2.3:a:atlassian:jira_service_management:5.5.0:*:*:*:data_center:*:*:* |
| atlassian | jira_service_management | 5.5.0 | cpe:2.3:a:atlassian:jira_service_management:5.5.0:*:*:*:server:*:*:* |
| URL | Tags |
|---|---|
| https://jira.atlassian.com/browse/JSDSERVER-12312 | Vendor Advisory |