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CVE-2021-26833

19
FAUCET Score

CVE-2021-26833 describes a cleartext storage vulnerability in TimelyBills for iOS (<= 1.7.0) and Android (<= 1.21.115), where JSON Web Tokens (JWTs) are stored unencrypted on disk due to insufficient cache clearing. This medium-severity vulnerability (CVSS 5.9) allows a local attacker with file access to retrieve these tokens, potentially exposing sensitive user data upon decoding, as JWTs are encoded and signed but not encrypted. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.7.0CPE matchmatch criteria
cpe:2.3:a:timelybills:timelybills:*:*:*:*:*:iphone_os:*:*
<= 1.21.115CPE matchmatch criteria
cpe:2.3:a:timelybills:timelybills:*:*:*:*:*:android:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.98%
Probability of exploitation in next 30 days
EPSS Percentile
58.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0098 is in the 17th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

beefaaubee.medium.com / cve-2021-26833-cleartext-storage-in-a-file-or-on-disk-in-timelybills-1-7-0-5760dc461bd0
ExploitThird Party Advisory