Is CVE-2026-104473 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104473 being exploited in the wild.

How severe is CVE-2026-104473?

Medium severity, with a CVSS score of 6.1, published 2 October 2026.

Is there a fix for CVE-2026-104473?

Yes: fixed in 4.5.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-104473 attacked?

It is attacked over the network.

Am I affected by CVE-2026-104473?

Check whether you run YesWiki 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.

CVE-2026-104473: YesWiki reflected cross-site scripting in multiple parameters

CVE-2026-104473 · Severity: medium · CVSS 6.1 · Published 2026-10-02

YesWiki is a wiki collaboration platform used to build and manage knowledge bases. Multiple reflected XSS vulnerabilities allow attackers to inject malicious JavaScript by crafting specially-designed links that execute when users click them. An attacker can exploit this to steal session cookies, impersonate authenticated users, or trick the application into performing unauthorized actions on a victim's behalf.

Technologies: YesWiki. Vendors: YesWiki.

Quick answers

Is CVE-2026-104473 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104473 being exploited in the wild.
How severe is CVE-2026-104473?: Medium severity, with a CVSS score of 6.1, published 2 October 2026.
Which products and versions are affected?: YesWiki before 4.5.3.
Is there a fix for CVE-2026-104473?: Yes: fixed in 4.5.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104473 attacked?: It is attacked over the network.
Am I affected by CVE-2026-104473?: Check whether you run YesWiki 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.

How to fix

Fixed in: 4.5.3

Technical details

Multiple reflected XSS flaws exist in unauthenticated and authenticated endpoints, with unsanitized parameters including incomingurl, id, file, tags, and template. The vulnerability requires user interaction (clicking a malicious link) and affects both authenticated and unauthenticated users. Successful exploitation allows arbitrary JavaScript execution in the victim's browser context, enabling session hijacking and abuse of backend functionality.

Affected products

YesWiki YesWiki before 4.5.3

Timeline

2026-03-29: disclosed
2026-10-02: advisory

References

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