CVE-2018-20859 — edx-platform before 2018-07-18 allows XSS via a response to a Chemical Equation

edx-platform before 2018-07-18 allows XSS via a response to a Chemical Equation advanced problem.

01What is this vulnerability?

edx-platform before 2018-07-18 allows XSS via a response to a Chemical Equation advanced problem.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-07-30T18:46:20.000Z
• Last modified: 2024-08-05T12:12:28.589Z

09References

• groups.google.com — https://groups.google.com/forum/#%21topic/openedx-announce/wsm5mtUhhME
• github.com — https://github.com/edx/edx-platform/commit/5b144559fbdba7ff673cc1c165aa2d343e07b…
• patch-diff.githubusercontent.com — https://patch-diff.githubusercontent.com/raw/edx/edx-platform/pull/18639.patch