Skip to content
Noroxi
NVD / CVE Program· CNA mitre

CVE-2012-1495: install/index.php in WebCalendar before 1.2.5 allows remote attackers to execute arbitrary code via the form_single_user_login parameter.

CriticalCVSS 9.8 · v3.1—Weaponized No fix recorded

Noroxi assessment

Priority: This week (action score 63/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 79.7% (FIRST EPSS); higher than 99.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Published
Jan 27, 2020
Updated
Jun 16, 2026
EPSS
79.7% · 99th percentile

Report tools

JSON

Action score

63

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
24 / 30 · 79.7%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2012-1495

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for webcalendar project records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
webcalendar projectwebcalendar

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • webcalendar project webcalendarbefore 1.2.5

Same product

webcalendar project: all records

Other highest-scoring records for the same primary product.

  • CVE-2012-1496Local file inclusion in WebCalendar before 1.2.5.
    36Monitor
  • CVE-2012-5385install/index.php in Craig Knudsen WebCalendar before 1.2.5 allows remote attackers to modify settings.php and possibly execute arbitrary…
    31Monitor
  • CVE-2024-22635WebCalendar v1.3.0 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the component…
    24Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2017-10840Aug 28, 2017 · Cross-site scripting vulnerability in WebCalendar 1.2.7 and earlier allows an attacker to inject arbitrary web script or HTML via…
    24Monitor
  • ← EarlierCVE-2017-10841Aug 28, 2017 · Directory traversal vulnerability in WebCalendar 1.2.7 and earlier allows authenticated attackers to read arbitrary files via unspecified…
    20Monitor
  • Later →CVE-2013-1422Feb 4, 2020 · webcalendar before 1.2.7 shows the reason for a failed login (e.g., "no such user").
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×2
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrywebapps2012-04-29
Exploit-DB entrywebapps2012-04-23
Metasploit moduleexploit/linux/http/webcalendar_settings_execWebCalendar 1.2.4 Pre-Auth Remote Code Injectionexploit2012-04-23
Proof-of-concept repository on GitHubstars:02023-06-08

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-2835 d
  2. Metasploit-2835 d
  3. Published
  4. TodayNov 14, 2026+2483 d

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records