The /rest/api/1.0/render resource in Jira Server and Data Center before version 8.5.13, from version 8.6.0 before version 8.13.5, and from version 8.14.0 before version 8.15.1 allows remote anonymous attackers to determine if a username is valid or not via a missing permissions check.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityLow
IntegrityNone
AvailabilityNone
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | PoC | E: U→P | 1.7 → 2.9 |
| 2026-07-21 | nvd | AV: P→N, AC: H→L, PR: H→N, UI: A→N, VC: N→L | 0.0 → 1.7 |
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 0.0 → 0.0 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| atlassian | data_center | < 8.5.13 |
| atlassian | jira | < 8.5.13 |
| Atlassian | Jira Data Center | < 8.5.13 |
| Atlassian | Jira Data Center | < 8.13.5 |
| Atlassian | Jira Data Center | < 8.15.1 |
| Atlassian | Jira Data Center | 8.14.0 |
| Atlassian | Jira Data Center | 8.6.0 |
| Atlassian | Jira Server | < 8.13.5 |
| Atlassian | Jira Server | < 8.15.1 |
| Atlassian | Jira Server | < 8.5.13 |
| Atlassian | Jira Server | 8.14.0 |
| Atlassian | Jira Server | 8.6.0 |
| atlassian | jira_data_center | ≥ 8.6.0, < 8.13.5 |
| atlassian | jira_data_center | ≥ 8.14.0, < 8.15.1 |
| atlassian | jira_server | ≥ 8.14.0, < 8.15.1 |
| atlassian | jira_server | ≥ 8.6.0, < 8.13.5 |
Published: 2021-04-01
