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Polylang

8known security flaws found in Polylang
since July 2014

Safe from 3.8.10

Version 3.8.10 or later fixes all of them. A site on an older version is open to them.

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When they were found.

Advisory: Cross-site scripting, July 2014Advisory: Forged requests, January 2019Major: Running code, October 2025Minor: Information leak, October 2025Minor: Cross-site scripting, July 2026Minor: Missing checks, September 2026Major: Running code, October 20262014201620182020202220242026

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • Running code

    Someone could run their own code on the server and take the site over: add malware, send spam, steal data, or use it to attack others.

    How: Part of the software treats something it was sent as instructions to follow, or keeps an uploaded file somewhere it can be run.

    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 (8)
  1. October 2026MajorRunning codeFixed in 3.8.10. Needs a login on the site (Editor+).
  2. September 2026MinorMissing checksFixed in 3.8.8. Needs a login on the site (Contributor+).
  3. July 2026MinorCross-site scriptingFixed in 3.8.10. Needs a login on the site (Contributor+).
  4. October 2025MajorRunning codeFixed in 3.7.4. Needs a login on the site.
  5. October 2025MinorInformation leakFixed in 3.8.6. Needs a login on the site (Contributor+).
  6. January 2019AdvisoryForged requestsFixed in 2.5.1.
  7. July 2014AdvisoryCross-site scriptingFixed in 1.5.2.
  8. Date not knownAdvisoryForged requestsFixed in 2.5.1.

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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