CVE-2008-2020

The CAPTCHA implementation as used in (1) Francisco Burzi PHP-Nuke 7.0 and 8.1, (2) my123tkShop e-Commerce-Suite (aka 123tkShop) 0.9.1, (3) phpMyBitTorrent 1.2.2, (4) TorrentFlux 2.3, (5) e107 0.7.11, (6) WebZE 0.5.9, (7) Open Media Collectors Database (aka OpenDb) 1.5.0b4, and (8) Labgab 1.1 uses a code_bg.jpg background image and the PHP ImageString function in a way that produces an insufficient number of different images, which allows remote attackers to pass the CAPTCHA test via an automated attack using a table of all possible image checksums and their corresponding digit strings.

Published: 2008-04-30 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2008-2020 is rated Moderate Risk (54.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.58%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2008-2020

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-07 0.52% 0.58% +0.06%
2 2025-03-30 0.44% 0.52% +0.08%
3 2025-03-29 — 0.44% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2008-2020

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2008-2020

Affected software / configurations for CVE-2008-2020

Vendor Product Version Raw CPE
e107 e107 0.7.11 cpe:2.3:a:e107:e107:0.7.11:*:*:*:*:*:*:*
labgab labgab 1.1 cpe:2.3:a:labgab:labgab:1.1:*:*:*:*:*:*:*
my123tkshop e-commerce-suite 0.9.1 cpe:2.3:a:my123tkshop:e-commerce-suite:0.9.1:*:*:*:*:*:*:*
opendb opendb 1.5.0 cpe:2.3:a:opendb:opendb:1.5.0:beta4:*:*:*:*:*:*
phpmybittorrent phpmybittorrent 1.2.2 cpe:2.3:a:phpmybittorrent:phpmybittorrent:1.2.2:*:*:*:*:*:*:*
phpnuke php-nuke 7.0 cpe:2.3:a:phpnuke:php-nuke:7.0:*:*:*:*:*:*:*
phpnuke php-nuke 8.1 cpe:2.3:a:phpnuke:php-nuke:8.1:*:*:*:*:*:*:*
torrentflux_project torrentflux 2.3 cpe:2.3:a:torrentflux_project:torrentflux:2.3:*:*:*:*:*:*:*
webze webze 0.5.9 cpe:2.3:a:webze:webze:0.5.9:*:*:*:*:*:*:*

References for CVE-2008-2020

cvelogic Threat Intelligence