CVE-2018-13818 — Twig before 2

Twig before 2.4.4 allows Server-Side Template Injection (SSTI) via the search search_key parameter. NOTE: the vendor points out that Twig itself is not a web application and states that it is the responsibility of web applications using Twig to properly wrap input to it

01What is this vulnerability?

Twig before 2.4.4 allows Server-Side Template Injection (SSTI) via the search search_key parameter. NOTE: the vendor points out that Twig itself is not a web application and states that it is the responsibility of web applications using Twig to properly wrap input to it

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: 2018-07-10T14:00:00.000Z
• Last modified: 2024-08-05T09:14:47.156Z

09References

• github.com — https://github.com/twigphp/Twig/blob/2.x/CHANGELOG
• github.com — https://github.com/twigphp/Twig/commit/eddb97148ad779f27e670e1e3f19fb323aedafeb
• www.exploit-db.com — https://www.exploit-db.com/exploits/44102/
• github.com — https://github.com/twigphp/Twig/issues/2743
• mobile.twitter.com — https://mobile.twitter.com/jameel_nabbo/status/1032593354704515072?s=20