# CVE-2026-88742: Bacularis stored XSS in client address field

Source: https://junglewise.ai/threats/cve-2026-88742-bacularis-stored-xss-in-client-address-field  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-88742 · Severity: medium · CVSS 5.4 · Published 2026-09-15

Bacularis is a web-based backup management system used to configure and monitor data backup jobs. A stored cross-site scripting (XSS) vulnerability in the client address field allows any authenticated user to inject malicious scripts that execute when other users view client details, potentially leading to account takeover, credential theft, or unauthorized administrative actions.

Technologies: [Bacularis](https://junglewise.ai/threats/technologies/bacularis). Vendors: [Bacularis](https://junglewise.ai/threats/vendors/bacularis).

## Quick answers

**Is CVE-2026-88742 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-88742 being exploited in the wild.

**How severe is CVE-2026-88742?** Medium severity, with a CVSS score of 5.4, published 15 September 2026.

**Which products and versions are affected?** Bacularis 1.0.0 through 6.5.0.

**Is there a fix for CVE-2026-88742?** A patch was published on 2026: Fixed in version 6.5.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-88742 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-88742?** Check whether you run Bacularis at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a stored XSS in the client address field during client creation/editing. An authenticated attacker can inject arbitrary JavaScript code (e.g., <script>prompt()</script>) into the address field; the payload is persisted in the database and executed in the browsers of all users who view the client details page. The attack requires authentication but affects all user roles, including normal users. The vulnerability exists in versions 1.0.0 through 6.5.0 and is fixed in version 6.5.1.

## Affected products

- Bacularis Bacularis 1.0.0 through 6.5.0

## Timeline

- 2026-09-15: disclosed
- 2026: patched: Fixed in version 6.5.1

## References

- [https://github.com/hekk-one/CVE](https://github.com/hekk-one/CVE)
- [https://hekk.one/posts/research/cve-2026-88742/](https://hekk.one/posts/research/cve-2026-88742/)

## Related threats

- [Bacularis stored cross-site scripting in Organization name](https://junglewise.ai/threats/cve-2026-95165-bacularis-5-4-0-6-5-1-is-vulnerable-to-cross-site-scripting-xss)
- [Bacularis stored XSS in director tags](https://junglewise.ai/threats/cve-2026-88743-bacularis-stored-xss-in-director-tags)