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Fencer Vulns
medium 4.9

CVE-2023-31473 json

An issue was discovered on GL.iNet devices before 3.216.

published 2023-05-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35778

cvss
4.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

An issue was discovered on GL.iNet devices before 3.216. There is an arbitrary file write in which an empty file can be created anywhere on the filesystem. This is caused by a command injection vulnerability with a filter applied. Through the software installation feature, it is possible to inject arbitrary parameters in a request to cause opkg to read an arbitrary file name while using root privileges. The -f option can be used with a configuration file.

Patch / fix

  • gl-inet gl-s20_firmware 3.216
  • gl-inet gl-x3000_firmware 3.216
  • gl-inet gl-mt3000_firmware 3.216
  • gl-inet gl-mt2500_firmware 3.216
  • gl-inet gl-mt2500a_firmware 3.216
  • gl-inet gl-axt1800_firmware 3.216
  • gl-inet gl-a1300_firmware 3.216
  • gl-inet gl-ax1800_firmware 3.216
  • gl-inet gl-sft1200_firmware 3.216
  • gl-inet gl-mt1300_firmware 3.216
  • gl-inet gl-e750_firmware 3.216
  • gl-inet gl-mv1000_firmware 3.216
  • gl-inet gl-mv1000w_firmware 3.216
  • gl-inet gl-s10_firmware 3.216
  • gl-inet gl-s200_firmware 3.216
  • gl-inet gl-s1300_firmware 3.216
  • gl-inet gl-sf1200_firmware 3.216
  • gl-inet gl-b1300_firmware 3.216
  • gl-inet gl-b2200_firmware 3.216
  • gl-inet gl-ap1300_firmware 3.216

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

3.87% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/gl-inet/CVE-issues/blob/main/3.215/Arbitrary_File_Read.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

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.