8.7

CVE-2020-37255: WordPress Time Capsule Plugin 1.21.16 Authentication Bypass

Deferred
Published 20-06-2026Last modified 15-07-2026

Vulnerability summary

CVE-2020-37255 is a high (CVSS 8.7) vulnerability in wptimecapsule time capsule plugin. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
45/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.63%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1exploit-database

Timeline

  1. 20-06-2026
    PublishedVulnerability first disclosed.
  2. 15-07-2026
    Last modifiedVulnerability information updated.

Description

WordPress Time Capsule Plugin 1.21.16 contains an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by sending a crafted POST request with the IWP_JSON_PREFIX header. Attackers can exploit this flaw to obtain valid administrator session cookies and access the WordPress dashboard without providing credentials.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.63% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • exploit-databasephpUnverified

    WordPress Plugin Time Capsule 1.21.16 - Authentication Bypass

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Wptimecapsule1 product

1 vendor · 1 product

References

3 links