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CVE-2018-13818

33
FAUCET Score

CVE-2018-13818 describes a critical Server-Side Template Injection (SSTI) vulnerability in Twig versions prior to 2.4.4, specifically exploitable via the search_key parameter. This flaw, rated with a CVSS score of 9.8, allows unauthenticated remote attackers to achieve high impact on confidentiality, integrity, and availability. While Twig itself is not a web application, applications utilizing Twig are responsible for input sanitization. Despite its high severity and significant community discussion (10 mentions), there is currently no evidence of active exploitation, nor are public exploit modules available in Metasploit, Nuclei, or ExploitDB.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.4.4CPE matchmatch criteria
cpe:2.3:a:symfony:twig:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.99%
Probability of exploitation in next 30 days
EPSS Percentile
93.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0699 is in the 88th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / twigphp/Twig/blob/2.x/CHANGELOG
Release Notes
github.com / twigphp/Twig/commit/eddb97148ad779f27e670e1e3f19fb323aedafeb
PatchThird Party Advisory
github.com / twigphp/Twig/issues/2743
ExploitThird Party Advisory
mobile.twitter.com / jameel_nabbo/status/1032593354704515072
ExploitThird Party Advisory
exploit-db.com / exploits/44102
ExploitThird Party AdvisoryVDB Entry