CVE-2019-20897

The avatar upload feature in affected versions of Atlassian Jira Server and Data Center allows remote attackers to achieve Denial of Service via a crafted PNG file. The affected versions are before version 8.5.4, from version 8.6.0 before 8.6.2, and from version 8.7.0 before 8.7.1.

Published: 2020-07-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-20897 is rated Moderate Risk (54/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.88%). EPSS rose +1.24% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-20897

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 0.64% 1.88% +1.24%
2 2025-12-22 0.83% 0.64% -0.19%
3 2025-11-21 — 0.83% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-20897

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2019-20897

Affected software / configurations for CVE-2019-20897

Vendor Product Version Raw CPE
atlassian jira < 8.5.4 cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*
atlassian jira_data_center >= 8.6.0, < 8.6.2 cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*
atlassian jira_data_center >= 8.7.0, < 8.7.1 cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*
atlassian jira_server >= 8.6.0, < 8.6.2 cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
atlassian jira_server >= 8.7.0, < 8.7.1 cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
atlassian jira_software_data_center < 8.5.4 cpe:2.3:a:atlassian:jira_software_data_center:*:*:*:*:*:*:*:*

References for CVE-2019-20897

URL Tags
https://jira.atlassian.com/browse/JRASERVER-70813 Patch Vendor Advisory
cvelogic Threat Intelligence