# CVE-2026-52763: YesWiki SQL injection in recentchanges action period argument

Source: https://junglewise.ai/threats/cve-2026-52763-yeswiki-sql-injection-in-recentchanges-action-period-argument  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-05. Updated: 2026-07-09  
License: CC BY 4.0 with a link back

CVE-2026-52763 · Severity: medium · CVSS 6.5 · Published 2026-09-05

YesWiki, a collaborative wiki platform, contains a security flaw that allows unauthorized access to its internal database. By saving a specially crafted page, an attacker can trick the system into revealing sensitive information, such as user credentials or private site data. This could lead to a full breach of the site's data and compromise of administrative accounts.

Technologies: [yeswiki/yeswiki (Packagist)](https://junglewise.ai/threats/technologies/yeswiki-yeswiki), [YesWiki](https://junglewise.ai/threats/technologies/yeswiki). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist), [YesWiki](https://junglewise.ai/threats/vendors/yeswiki).

## Quick answers

**Is CVE-2026-52763 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-52763 being exploited in the wild.

**How severe is CVE-2026-52763?** Medium severity, with a CVSS score of 6.5, published 5 September 2026.

**Which products and versions are affected?** yeswiki/yeswiki (Packagist) < 4.6.6, ECOSYSTEM:introduced=0,fixed=4.6.6; YesWiki < 4.6.6.

**Is there a fix for CVE-2026-52763?** Yes. yeswiki/yeswiki (Packagist): upgrade to 4.6.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-52763 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-52763?** Check whether you run yeswiki/yeswiki (Packagist) or 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

- yeswiki/yeswiki (Packagist): upgrade to 4.6.6 or later

  ```sh
  composer require yeswiki/yeswiki:^4.6.6
  ```


## Technical details

A SQL injection vulnerability exists in YesWiki's `recentchanges` action (`actions/recentchanges.php`). The application fails to validate the `period` argument when it is provided via an action invocation (e.g., `{{recentchanges period="..."}}`), bypassing a whitelist that only applies to URL query parameters. This unvalidated input is passed to `PageManager::getRecentlyChanged()`, where it is directly interpolated into a SQL query without escaping or parameterization. An attacker with page-editing privileges (which are granted to anonymous users by default) can perform UNION-based injection to exfiltrate arbitrary data from the database. The vulnerability is fixed in version 4.6.6.

## Affected products

- YesWiki yeswiki < 4.6.6

## Identifiers

- CVE-2026-52763
- GHSA-89v6-j5x6-cmj3

## Timeline

- 2026-06-02: disclosed
- 2026-06-02: patched: Fixed in version 4.6.6
- 2026-07-09: advisory

## References

- [https://api.github.com/users/CosmicCrusader23](https://api.github.com/users/CosmicCrusader23)
- [https://github.com/CosmicCrusader23](https://github.com/CosmicCrusader23)
- [https://api.github.com/users/CosmicCrusader23/gists%7B/gist_id%7D](https://api.github.com/users/CosmicCrusader23/gists%7B/gist_id%7D)
- [https://api.github.com/users/CosmicCrusader23/repos](https://api.github.com/users/CosmicCrusader23/repos)
- [https://avatars.githubusercontent.com/u/217740635?v=4](https://avatars.githubusercontent.com/u/217740635?v=4)
- [https://api.github.com/users/CosmicCrusader23/events%7B/privacy%7D](https://api.github.com/users/CosmicCrusader23/events%7B/privacy%7D)

## Related threats

- [YesWiki SQL injection in despam.php INTERVAL operand](https://junglewise.ai/threats/cve-2026-116828-yeswiki-before-4-7-0-contains-a-sql-injection-vulnerability-in)
- [YesWiki server-side request forgery in Bazar CSV import](https://junglewise.ai/threats/cve-2026-116827-yeswiki-before-4-7-0-contains-a-server-side-request-forgery)
- [YesWiki server-side request forgery in DuplicationManager](https://junglewise.ai/threats/cve-2026-116826-yeswiki-before-4-7-0-contains-a-server-side-request-forgery)
- [YesWiki HTTP Signature replay protection missing in ActivityPub inbox](https://junglewise.ai/threats/cve-2026-116825-yeswiki-from-4-6-2-before-4-7-0-lacks-replay-protection-in)
- [YesWiki stored cross-site scripting in referrers_sites handler](https://junglewise.ai/threats/cve-2026-116824-yeswiki-before-4-7-0-contains-a-stored-cross-site-scripting)