5.8

CVE-2013-2503: privoxy Improper Input Validation

CVSS: 5.8v2.0MediumModified
AliasesUBUNTU-CVE-2013-2503DEBIAN-CVE-2013-2503
Published 11-03-2013Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2013-2503 is a medium (CVSS 5.8) Improper Input Validation vulnerability in privoxy. EPSS estimates a 4.63% chance of exploitation in the next 30 days, higher than 91.6% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v2.0 (NVD)
EPSS score
4.63%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2reference, exploit-database

Timeline

  1. 11-03-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

Privoxy before 3.0.21 does not properly handle Proxy-Authenticate and Proxy-Authorization headers in the client-server data stream, which makes it easier for remote HTTP servers to spoof the intended proxy service via a 407 (aka Proxy Authentication Required) HTTP status code.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

4.63%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

0.00 pp

From 4.63% on 19-09-2026

19-09-202619-10-2026
EPSS score
4.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (blog.c22.cc)

    Maturity: unknown

  • exploit-databasephpVerified

    Privoxy Proxy - Authentication Information Disclosure

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • privoxy< 3.0.21-1
Privoxy1 product
  • privoxy≤ 3.0.20 | 2.9.0:pre-alpha | 2.9.1:pre-alpha | 2.9.2:pre-alpha | 2.9.3:pre-alpha | 2.9.11:alpha | 2.9.11:beta | 2.9.11:pre-alpha | 2.9.12:beta | 2.9.13:beta | 2.9.14:beta | 2.9.16 | 2.9.18 | 3.0 | 3.0.2 | 3.0.3 | 3.0.5:beta | 3.0.6 | 3.0.7:beta | 3.0.8 | 3.0.9:beta | 3.0.10 | 3.0.11 | 3.0.12 | 3.0.13:beta | 3.0.14:beta | 3.0.15:beta | 3.0.16 | 3.0.17 | 3.0.18 | 3.0.19
Ubuntu1 product
  • privoxy< 3.0.21-2

3 vendors · 3 products

References

6 links