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

Source: https://junglewise.ai/threats/cve-2026-104473-yeswiki-before-4-5-3-contains-multiple-reflected-cross-site  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-02. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/yeswiki). Vendors: [YesWiki](https://junglewise.ai/threats/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

- [https://github.com/YesWiki/yeswiki/security/advisories/GHSA-5724-x3rh-5qqq](https://github.com/YesWiki/yeswiki/security/advisories/GHSA-5724-x3rh-5qqq)
- [https://www.vulncheck.com/advisories/yeswiki-before-4.5.3-multiple-reflected-xss-via-bazar-and-listpages](https://www.vulncheck.com/advisories/yeswiki-before-4.5.3-multiple-reflected-xss-via-bazar-and-listpages)

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