PyroCMS remote code execution vulnerability

published 2023-08-04 3 y ago modified 2026-06-17 4 mo ago also GHSA-w7vm-4v3j-vgpw , EUVD-2023-2371

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 53.5%; EPSS 53.5% chance of exploitation in 30 days, percentile 98%
public exploits: 1; Exploit-DB

PyroCMS 3.9 contains a remote code execution (RCE) vulnerability that can be exploited through a server-side template injection (SSTI) flaw. This vulnerability allows a malicious attacker to send customized commands to the server and execute arbitrary code on the affected system.

Timeline

2023-08-04 Published
2023-08-08 First public exploit (EDB-51669)

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 2 y ago (2024-10-17)

Exploit prediction

53.46% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-51669 Pyro CMS 3.9 - Server-Side Template Injection (SSTI) (Authenticated) webapps, 2023-08-08
cupc4k3.lol https://cupc4k3.lol/ssti-leads-to-rce-on-pyrocms-7515be27c811 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
packagist	pyrocms/pyrocms	<=3.9	no fix listed

References

cupc4k3.lol /ssti-leads-to-rce-on-pyrocms-7515be27c811
web, exploit, third-party-advisory
packetstormsecurity.com /files/174088/Pyro-CMS-3.9-Server-Side-Template-Injection.html
web
nvd.nist.gov /vuln/detail/CVE-2023-29689
advisory
github.com /pyrocms/pyrocms
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary