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Fencer Vulns
medium 5.9

CVE-2023-37360 json

pacparser_find_proxy in Pacparser before 1.4.2 allows JavaScript injection, and possibly privilege escalation, when the attacker controls t…

published 2023-06-30 3 y ago modified 2026-06-17 4 mo ago also GHSA-62q6-v997-f7v9 , PYSEC-2023-93 , EUVD-2023-0190

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

pacparser_find_proxy in Pacparser before 1.4.2 allows JavaScript injection, and possibly privilege escalation, when the attacker controls the URL (which may be realistic within enterprise security products).

Patch / fix

  • pypi pacparser 1.4.2
  • pacparser_project pacparser 1.4.2
  • pacparser Debian 14, Debian 13 1.4.3-1

debian advisories DEBIAN-CVE-2023-37360

CISA SSVC

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

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/manugarg/pacparser/security/advisories/GHSA-62q6-v997-f7v9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AC:L/AV:L/A:L/C:L/I:L/PR:N/S:U/UI:N
CNA 3.1 5.9 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi pacparser
<1.4.2
1.4.2

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

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.