The Yahoo! Tumblr app before 3.4.1 for iOS sends cleartext credentials, which allows remote attackers to obtain sensitive information by sn…

published 2013-07-18 13 y ago modified 2026-06-16 4 mo ago also EUVD-2013-4718

cvss: 5.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.1%; EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

The Yahoo! Tumblr app before 3.4.1 for iOS sends cleartext credentials, which allows remote attackers to obtain sensitive information by sniffing the network.

Patch / fix

links 1

itunes.apple.com/us/app/tumblr/id305343404 patch

Exploit prediction

2.07% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

CWE-255 Credentials Management Errors

References

itunes.apple.com /us/app/tumblr/id305343404
patch
staff.tumblr.com /post/55648373578/important-security-update-for-iphone-ipad-users
vendor-advisory
osvdb.org /95374
vdb-entry
theregister.co.uk /2013/07/17/tumblr_ios_snafu_fixed/
exchange.xforce.ibmcloud.com /vulnerabilities/85823
vdb-entry

Sources

CVE List CVE-2013-4873
NVD CVE-2013-4873

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary