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Safe SVG

12known security flaws found in Safe SVG
since November 2019

Safe from 2.5.1

Version 2.5.1 or later fixes all of them. A site on an older version is open to them.

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When they were found.

Major: Knocking it over, November 2019Major: Knocking it over, November 2019Advisory: Knocking it over, November 2019Advisory: Cross-site scripting, November 2019Advisory: Cross-site scripting, November 2019Minor: Cross-site scripting, March 2022Advisory: a security flaw, March 2022Advisory: Cross-site scripting, March 2023Minor: Cross-site scripting, October 2024Minor: Cross-site scripting, September 2026Minor: Missing checks, September 202620192020202120222023202420252026

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • 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
  • Cross-site scripting

    Someone could make your pages run their own script in visitors' browsers, to steal logins, show a fake payment form or send people to a scam site.

    How: The software puts text it was sent back onto a page without making it safe first, so a script hidden in a link, form or comment runs as if it were part of your site.

    Read about it here
  • 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
Every known flaw, newest first (12)
  1. September 2026MinorCross-site scriptingFixed in 2.5.1. Needs a login on the site.
  2. September 2026MinorMissing checksFixed in 2.5.1. Needs a login on the site (Contributor+).
  3. October 2024MinorCross-site scriptingFixed in 2.2.6. Needs a login on the site.
  4. March 2023AdvisoryCross-site scriptingFixed in 2.1.0.
  5. March 2022MinorCross-site scriptingFixed in 1.9.10. No login needed.
  6. March 2022AdvisoryA security flawFixed in 1.9.10.
  7. November 2019AdvisoryCross-site scriptingFixed in 1.9.6.
  8. November 2019AdvisoryCross-site scriptingFixed in 1.9.6.
  9. November 2019MajorKnocking it overFixed in 1.9.5. No login needed.
  10. November 2019MajorKnocking it overFixed in 1.9.5. No login needed.
  11. November 2019AdvisoryKnocking it overFixed in 1.9.5.
  12. Date not knownAdvisoryCross-site scriptingFixed in 1.9.6.

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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