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Really Simple Security

13known security flaws found in Really Simple Security
since April 2024

Safe from 9.8.3

Version 9.8.3 or later fixes all of them. A site on an older version is open to them.

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When they were found.

Minor: Server side request forgery, April 2024Dangerous: Missing checks, November 2024Minor: Forged requests, January 2025Minor: Missing checks, March 2026Advisory: Missing checks, June 2026Minor: Missing checks, June 2026Major: Missing checks, June 2026Advisory: Missing checks, June 2026Major: Missing checks, September 2026Minor: Knocking it over, September 2026Minor: Missing checks, September 2026Advisory: Missing checks, September 2026Advisory: Knocking it over, September 2026202420252026

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • Missing checks

    Someone could do things only an administrator should: change settings, see private data, or give themselves more rights.

    How: Part of the software forgets to check who is asking before it does what was asked.

    Read about it here
  • Knocking it over

    Someone could slow the site down or stop it answering, by sending requests that use up all its memory or time.

    How: Certain input makes the software do far more work than it should, so a handful of requests is enough to tie it up.

    Read about it here
  • Forged requests

    Someone could get a signed in administrator to change something without knowing, such as adding a new admin or changing settings, just by visiting a page.

    How: The software does not check that a change came from its own pages, so another site can quietly send one through the administrator's browser.

    Read about it here
Every known flaw, newest first (13)
  1. September 2026AdvisoryKnocking it overFixed in 9.8.3. No login needed.
  2. September 2026AdvisoryMissing checksFixed in 9.8.1. No login needed.
  3. September 2026MinorMissing checksFixed in 9.8.2. Needs a login on the site.
  4. September 2026MajorMissing checksFixed in 9.8.1. No login needed.
  5. September 2026MinorKnocking it overFixed in 9.8.1. No login needed.
  6. June 2026AdvisoryMissing checksFixed in 9.8.0.
  7. June 2026MinorMissing checksFixed in 9.5.10. Needs a login on the site.
  8. June 2026MajorMissing checksFixed in 9.5.10.1. No login needed.
  9. June 2026AdvisoryMissing checksFixed in 9.5.10.1.
  10. March 2026MinorMissing checksFixed in 9.5.8. Needs a login on the site.
  11. January 2025MinorForged requestsFixed in 9.2.0. No login needed.
  12. November 2024DangerousMissing checks No login needed.
  13. April 2024MinorServer side request forgeryFixed in 8.0.0. Needs a login on the site.

From the public lists of known flaws, checked daily. A flaw is listed once it is made public, often after a fix is out.

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