CVE-2012-1495

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because EPSS predicts 89% probability of exploitation within the next 30 days (top 0.5% of all CVEs). NVD baseline CVSS 9.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 80%
CISA-KEV: Not listedEPSS: 80%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.6%
KEV
Not listed

Published

January 27, 2020

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jun 7, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

WebCalendar 1.2.4 - Remote Code Execution - PHP webapps Exploit

https://www.exploit-db.com/exploits/18775
generic

WebCalendar - Browse /webcalendar 1.2/1.2.5 at SourceForge.net

http://sourceforge.net/projects/webcalendar/files/webcalendar%201.2/1.2.5/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 15× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:22 UTCEPSS rescore
  2. 2026-07-06 16:23 UTCEPSS rescore
  3. 2026-07-04 06:27 UTCEPSS rescore
  4. 2026-06-30 23:19 UTCEPSS rescore
  5. 2026-06-30 23:19 UTCEPSS rescore
  6. 2026-06-27 03:05 UTCEPSS rescore
  7. 2026-06-27 03:05 UTCEPSS rescore
  8. 2026-06-25 13:46 UTCEPSS rescore
  9. 2026-06-25 13:46 UTCEPSS rescore
  10. 2026-06-23 21:30 UTCEPSS rescore
  11. 2026-06-17 17:49 UTCEPSS rescore
  12. 2026-06-17 17:49 UTCEPSS rescore
  13. 2026-06-15 17:44 UTCEPSS rescore
  14. 2026-06-13 22:57 UTCEPSS rescore
  15. 2026-06-12 23:08 UTCEPSS rescore
  16. 2026-06-11 13:56 UTCEPSS rescore
  17. 2026-06-10 22:14 UTCEPSS rescore
  18. 2026-06-10 13:18 UTCEPSS rescore
  19. 2026-06-06 13:45 UTCEPSS rescore
  20. 2026-06-06 13:45 UTCEPSS rescore
  21. 2026-06-05 22:44 UTCEPSS rescore
  22. 2026-06-05 22:44 UTCEPSS rescore
  23. 2026-06-01 13:49 UTCEPSS rescore
  24. 2026-05-31 00:14 UTCEPSS rescore
  25. 2026-05-31 00:14 UTCEPSS rescore
Show 8 more
  1. 2026-05-29 13:41 UTCEPSS rescore
  2. 2026-05-28 13:42 UTCEPSS rescore
  3. 2026-05-28 13:42 UTCEPSS rescore
  4. 2026-05-27 08:38 UTCEG score recompute
  5. 2026-05-27 08:38 UTCGHSA enrichment
  6. 2026-05-26 07:16 UTCEPSS rescore
  7. 2026-05-26 07:16 UTCEPSS rescore
  8. 2026-05-26 07:16 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-18797✓ verified
    First seen Apr 29, 2012

    WebCalendar 1.2.4 - Remote Code Injection (Metasploit)

    Open source ↗
  • Exploit-DBEDB-18775✓ verified
    First seen Apr 23, 2012

    WebCalendar 1.2.4 - Remote Code Execution

    Open source ↗
  • Metasploitexploit/linux/http/webcalendar_settings_exec✓ verified
    First seen Apr 23, 2012

    WebCalendar 1.2.4 Pre-Auth Remote Code Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2012-1495?
CVE-2012-1495 is a critical vulnerability published on January 27, 2020. install/index.php in WebCalendar before 1.2.5 allows remote attackers to execute arbitrary code via the formsingleuser_login parameter.
When was CVE-2012-1495 disclosed?
CVE-2012-1495 was first published in the National Vulnerability Database on January 27, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-1495 actively exploited?
CVE-2012-1495 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2012-1495?
CVE-2012-1495 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2012-1495?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-1495, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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