Security readout for executives and security teams
Plain-English summary
CVE-2023-26255 lets an unauthenticated attacker read files from a Jira server running STAGIL Navigation for Jira - Menu & Themes before 2.0.52. The business risk is exposure of sensitive local files, not system takeover, data modification, or outage based on the supplied sources.
Executive priority
Treat as high priority for Jira environments using this plugin because exploitation requires no login and can expose sensitive server files. Prioritize internet-facing or partner-facing Jira systems first. If the plugin is absent or updated beyond the affected range, urgency drops materially.
Technical view
The vulnerability is CWE-22 path traversal in the plugin's snjCustomDesignConfig endpoint. Manipulating the fileName parameter can traverse directories and read files from the filesystem. CVSS 3.1 is 7.5, driven by network access, no authentication, no user interaction, and high confidentiality impact.
Likely exposure
Exposure is limited to Jira environments using STAGIL Navigation for Jira - Menu & Themes before 2.0.52, especially where the affected endpoint is reachable by unauthenticated users. The source bundle does not provide reliable CPE data or broader affected product metadata.
Exploitation context
The sources describe a practical unauthenticated file-read condition and include a public researcher reference. CISA KEV status is false in the supplied bundle, and no cited source here confirms active exploitation in the wild.
Researcher notes
The evidence supports unauthenticated path traversal via fileName on snjCustomDesignConfig with confidentiality-only impact. Affected product metadata in the bundle is incomplete, so validation should rely on actual plugin inventory and version checks rather than CPE matching.
Mitigation direction
- Inventory Jira instances for the STAGIL Navigation plugin and installed version.
- Upgrade affected installations to 2.0.52 or later where vendor guidance supports it.
- Review vendor marketplace and advisories for current remediation instructions.
- Limit unauthenticated network reachability to Jira and plugin endpoints where feasible.
- Investigate possible sensitive file exposure if vulnerable systems were internet-facing.
Validation and detection
- Confirm whether STAGIL Navigation for Jira - Menu & Themes is installed.
- Verify the installed plugin version is before 2.0.52 or updated.
- Check Jira access logs for suspicious requests to snjCustomDesignConfig.
- Assess whether unauthenticated users can reach the affected Jira endpoint.
- Review exposed hosts for sensitive local files that may have been readable.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-26255 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.