CVE-2018-3769 — ruby-grape ruby gem suffers from a cross-site scripting (XSS) vulnerability via

ruby-grape ruby gem suffers from a cross-site scripting (XSS) vulnerability via "format" parameter.

01What is this vulnerability?

ruby-grape ruby gem suffers from a cross-site scripting (XSS) vulnerability via "format" parameter.

02Affected products

Vendor	Product	Versions
Ruby Grape	ruby	grape ruby gem — >= 1.0.3

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: 2018-07-05T16:00:00.000Z
• Last modified: 2024-08-05T04:50:30.727Z

09References

• github.com — https://github.com/ruby-grape/grape/commit/6876b71efc7b03f7ce1be3f075eaa4e7e6de1…
• github.com — https://github.com/ruby-grape/grape/issues/1762
• github.com — https://github.com/ruby-grape/grape/pull/1763