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CVE-2007-0681

42
FAUCET Score

CVE-2007-0681 is a critical vulnerability affecting ExtCalendar 2 and earlier, allowing remote attackers to change arbitrary user passwords via modified values to register.php without requiring the original password. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with no authentication or user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog, public exploit code exists on ExploitDB, and the vulnerability has garnered significant community discussion, indicating potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2CPE matchmatch criteria
cpe:2.3:a:extcalendar_project:extcalendar:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.04%
Probability of exploitation in next 30 days
EPSS Percentile
91.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-3239 · Jan 31, 2007
This CVE's current EPSS score of 0.0504 is in the 86th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

osvdb.org / 38130
Broken Link
exchange.xforce.ibmcloud.com / vulnerabilities/32035
Third Party AdvisoryVDB Entry
exploit-db.com / exploits/3239
ExploitThird Party AdvisoryVDB Entry