ACS Advanced Comment System 1.0 is affected by Directory Traversal via an advanced_component_system/index.php?ACS_path=..%2f URI.

published 2020-12-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-23264

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 20.8%; EPSS 20.8% chance of exploitation in 30 days, percentile 97%
public exploits: 1; Exploit-DB, plus a Nuclei check

ACS Advanced Comment System 1.0 is affected by Directory Traversal via an advanced_component_system/index.php?ACS_path=..%2f URI. NOTE: this might be the same as CVE-2009-4623

Timeline

2020-12-23 Published
2021-01-04 First public exploit (EDB-49343)

Exploit prediction

20.84% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-49343 Advanced Comment System 1.0 - 'ACS_path' Path Traversal webapps, 2021-01-04
Nuclei template Advanced Comment System 1.0 - Local File Inclusion nuclei detection template
seclists.org https://seclists.org/fulldisclosure/2020/Dec/13 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

seclists.org /fulldisclosure/2020/Dec/13
exploit, mailing-list, third-party-advisory

Sources

CVE List CVE-2020-35598
NVD CVE-2020-35598

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