# CVE-2026-62113: Slim SEO Insecure Direct Object References in contributor endpoints

Source: https://junglewise.ai/threats/cve-2026-62113-slim-seo-insecure-direct-object-references-in-contributor  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-11. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-62113 · Severity: medium · CVSS 4.3 · Published 2026-09-11

Slim SEO is a popular WordPress SEO optimization plugin. The vulnerability allows authenticated users with contributor-level permissions to access and potentially modify data belonging to other users by manipulating object identifiers in URLs. This could lead to exposure of sensitive data or unauthorized modification of content.

Vendors: [eLightUp](https://junglewise.ai/threats/vendors/elightup).

## Quick answers

**Is CVE-2026-62113 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-62113 being exploited in the wild.

**How severe is CVE-2026-62113?** Medium severity, with a CVSS score of 4.3, published 11 September 2026.

**Which products and versions are affected?** eLightUp Slim SEO <= 4.10.0.

**Is there a fix for CVE-2026-62113?** A patch was published on 2026-09-11: Version 4.10.1 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-62113 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-62113?** Check whether you run eLightUp Slim SEO 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 an Insecure Direct Object References (IDOR) flaw in Slim SEO versions up to 4.10.0 that affects contributor-level endpoints. An authenticated user with contributor privileges can change numeric IDs in URLs to access or manipulate objects (such as posts or settings) belonging to other users. The attack requires authentication as a contributor but no special privileges. The vulnerability was patched in version 4.10.1.

## Affected products

- eLightUp Slim SEO <= 4.10.0

## Timeline

- 2026-08-31: disclosed: Reported by Sybre Waaijer
- 2026-09-11: advisory: Published by Patchstack
- 2026-09-11: patched: Version 4.10.1 released

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/slim-seo/vulnerability/wordpress-slim-seo-plugin-4-10-0-insecure-direct-object-references-idor-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/slim-seo/vulnerability/wordpress-slim-seo-plugin-4-10-0-insecure-direct-object-references-idor-vulnerability?_s_id=cve)

## Related threats

- [eLightUp Slim SEO broken access control](https://junglewise.ai/threats/cve-2026-57429-elightup-slim-seo-broken-access-control)